SOLUTION: hello:)im not all that good at math its a subsitution problem and i need help! please. y=x-1 3x+4y=17

Algebra ->  Expressions-with-variables -> SOLUTION: hello:)im not all that good at math its a subsitution problem and i need help! please. y=x-1 3x+4y=17      Log On


   

Question 672834: hello:)im not all that good at math its a subsitution problem and i need help! please.
y=x-1
3x+4y=17
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
y=x-1
3x+4y=17
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y is solved for in the 1st eqn, so sub for y in the 2nd.
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3x+4y=17
3x + 4(x-1) = 17
3x + 4x-4 = 17
7x = 21
x = 3
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y = x-1
y = 2
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Nothing to it.