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Okay I have this question, but I am getting the wrong answer, where am I going wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 5 (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 5 (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
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#2
(Original post by theoallen)
Okay I have this question, but I am getting the wrong answer, where am I going wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 20 (not 5) (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
Okay I have this question, but I am getting the wrong answer, where am I going wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 20 (not 5) (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
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reply
Report
#3
(Original post by theoallen)
Okay I have this question, but I am getting the wrong answer, where am I going wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 5 (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
Okay I have this question, but I am getting the wrong answer, where am I going wrong?
1 1/4 (4-2x) = 5/14 (6x+1)
So first I make it look nicer
5 (4-2x) / 4 = 5 (6x+1) / 14
Then I cross multiply
70(4-2x) = 20(6x+1)
Then multiply out he brackets
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
You seem to have done your final rearranging wrong.
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#4
(Original post by theoallen)
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
280-140x = 120x + 20
And then rearrange
140x-120x = 280+20 = 300, but that's not the answer, what have I done wrong?
280 - 140x = 120x + 20
Move the 140x over (it becomes a +)
280 = 140x + 120x + 20
Move the 20 over (it becomes a -)
280 - 20 = 140x + 120x
Simplify and solve.
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#5
(Original post by Axel Johann)
You didn't multiply the right hand side by 5
You didn't multiply the right hand side by 5
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#6
(Original post by Axel Johann)
You didn't multiply the right hand side by 5
You didn't multiply the right hand side by 5
(Original post by natninja)
Is x=1 the answer by any chance?
Is x=1 the answer by any chance?
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#7
(Original post by natninja)
He didn't multiply the left hand side by 5 either then... he just converted from
He didn't multiply the left hand side by 5 either then... he just converted from
whoops
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(Original post by Axel Johann)
You didn't multiply the right hand side by 5
You didn't multiply the right hand side by 5
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#9
(Original post by theoallen)
Am I meant too? Why would I multiply it by 5?
Am I meant too? Why would I multiply it by 5?
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#10
(Original post by theoallen)
Am I meant too? Why would I multiply it by 5?
Am I meant too? Why would I multiply it by 5?
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