Question 1156521: Use the substitution method to solve the following system of equations.
7x-y=14
3x+4y=6 Found 2 solutions by ankor@dixie-net.com, josgarithmetic:Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! se the substitution method to solve the following system of equations.
7x-y=14
3x+4y=6
:
Use the first equation for substitution
-y = -7x + 14
multiply by -1
y = 7x - 14
:
In the 2nd equation, replace y with (7x-14)
3x + 4(7x-14) = 6
3x + 28x - 56 = 6
31x = 6 + 56
31x = 62
x = 62/31
x = 2
find y
y = 7(2) - 14
y = 0
:
:
Check solution in the 2nd equation
3(2) + 4(0) = 6
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