JJ Downey
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Need some help solving a maths equation to make X the subject....

x
__________ = y
v-w
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ClaraOswald
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(Original post by JJ Downey)
Need some help solving a maths equation to make X the subject....

x
__________ = y
v-w
Multiply by the denominator.

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JJ Downey
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how?!?
would the answer be

x=yv-w?

normally im good at maths but this is just stressful haha!
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ClaraOswald
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(Original post by JJ Downey)
how?!?
would the answer be

x=yv-w?

normally im good at maths but this is just stressful haha!
Nearly there, the y would be multiplied by (v-w), not just one of them

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JJ Downey
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ok so would the answer be


x=yv-yw?
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ClaraOswald
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(Original post by JJ Downey)
ok so would the answer be


x=yv-yw?
Yep.

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JJ Downey
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(Original post by ClaraOswald)
Yep.

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Thank You!
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JJ Downey
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(Original post by JJ Downey)
Thank You!
Would it not turn to x=vy+yw

when i am making x the subject?
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ClaraOswald
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(Original post by JJ Downey)
Would it not turn to x=vy+yw

when i am making x the subject?
Why do you think that should happen?

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JJ Downey
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just been taught that when you take a number or letter over the equal sign it goes to the opposite such as when you do

Make X the Subject

x-y=w

the answer would be

x=w+y
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ClaraOswald
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(Original post by JJ Downey)
just been taught that when you take a number or letter over the equal sign it goes to the opposite such as when you do

Make X the Subject

x-y=w

the answer would be

x=w+y
Yes, and the opposite of division is multiplication. That's all you need to do.

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Temporality
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(Original post by JJ Downey)
Need some help solving a maths equation to make X the subject....

x
__________ = y
v-w

If you multiply both sides by (v - w) you get:

x (v - w)
__________ = y ( v - w)

(v - w)

so you can cancel out both (v - w) on the left handside so you get:

x = y (v - w)

Done. On the right hand side you could multiply out so you would get the equation:
x = yv - yw
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JJ Downey
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(Original post by Temporality)
If you multiply both sides by (v - w) you get:

x (v - w)
__________ = y ( v - w)

(v - w)

so you can cancel out both (v - w) on the left handside so you get:

x = y (v - w)

Done. On the right hand side you could multiply out so you would get the equation:
x = yv - yw

ok that does make sense thank you for all your help
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