Question 378629: This is actually elimination but my question is if my problem is 2x+2/3y=4
x-1/2y=7
How can i figure it out i've tried everything but when i plug it back in it doesn't work.
Thanks
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! 2x + 2/3y = 4
x - 1/2y = 7
:
First get rid of the fractions, multiply the 1st eq by 3, the 2nd by 2
6x + 2y = 12
2x - y = 14
:
Multiply the 2nd equation by 2, add to the 1st equation
6x + 2y = 12
4x - 2y = 28
---------------adding eliminates y, for x
10x = 40
x = 40/10
x = 4
:
Find y using 6x + 2y = 12
6(4) + 2y = 12
2y = 12 - 24
2y = -12
y = -6
:
:
Try these values in the original equations
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