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Question 180954: what is the substitution method of y=2x-1 and y=-3x+4
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! what is the substitution method of y=2x-1 and y=-3x+4
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The substitution method can be used for any set of equations.
I'll proceed assuming you meant to ask how the substitution method can be used to solve for x and y in the 2 equations you entered.
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y=2x-1 and y=-3x+4
Since both expressions on the right sides of the eqns = y, they equal each other.
2x-1 = -3x+4
This is substitution, the right sides were substituted for y.
Add 3x
5x-1 = 4
Add 1
5x = 4
x = 1 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Now substitute 1 for x into either eqn to find y.
y = 2*1-1
y = 1 yyyyyyyyyyyyyyyyyyyyyyyyyyyy
we're done.
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