Question 93659: I am stumped on this one.
Solve the system by addition.
-4x + 5y = 5
x - 2y = -2
Could you help guide me on the right track? Thank you.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Solve the system by addition.
-4x + 5y = 5
x - 2y = -2
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If you solve it by substitution you proceed as follows:
Solve the 2nd equation for x to get x = 2y-2
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Substitute that value into the 1st equation and solve for y, as follows:
-4(2y-2)+5y = 5
-8y+8 + 5y = 5
-3y = -3
y = 1
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Substitute that into x = 2y-2 to solve for "x", as follows:
x = 2*1 -2
x = 0
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Solution for the system (0,1)
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Cheers,
Stan H.
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