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# Simultaneous equations, how do you know when you need to get the x/ys the same? watch

1. Sometimes, it seems that you have to get either the x or y's the same in both equations, and others you dont.

Why is this? Is it that you don't need to when adding the equations?
2. (Original post by blobbybill)
Sometimes, it seems that you have to get either the x or y's the same in both equations, and others you dont.

Why is this? Is it that you don't need to when adding the equations?
Legit no clue what you're talking about. Mind posting an example?
3. If you find that either the x or y is different, then you can multiply it by a factor so either the x or y are the same and you can solve it.
4. jfc, the word "coefficient" is a thing, guys...
5. (Original post by blobbybill)
Sometimes, it seems that you have to get either the x or y's the same in both equations, and others you dont.

Why is this? Is it that you don't need to when adding the equations?
when the coefficient of either x and y are the same then you can solve.

some simultaneous equation have either x or y coefficients the same some don't

(Original post by Zacken)
jfc, the word "coefficient" is a thing, guys...
lol i only knew what that word meant when i started M1 xD i just called it the number in front of x or y

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