How do you find x and y? I keep doing guess and check and it takes a long time. please tell me any shortcuts, if you have any. Thanks!
3x+2y=7
2x+3y=8
3x+2y=7
2x+3y=8
1 Answer
You can use elimination or substitution to solve this. I will show you elimination because I prefer it. Someone else can do substitution. (Besides, this message is long enough already >_<).
Elimination:
We want to make either
Now subtract the equations. I will subtract the second equation from the first so we don't get negative numbers (no one wants negative numbers if they can avoid them!):
Now substitute for
Checking our answer using the OTHER equation (very important so you don't make the same mistake twice!):
We're good!
So the answer is:
