SOLUTION: i have to use substitution to solve this linear system x + 4y = 17 5x + 2y = -5

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Question 445784: i have to use substitution to solve this linear system
x + 4y = 17
5x + 2y = -5
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x=-4y+17
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5(-4y+17)+2y=-5
-20y+85+2y=-5
-18y=-90
y=5
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5x+2*5=-5
5x=-15
x=-3
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-3+4*5=17
-3+20=17