SOLUTION: solve by substitution x+2y=11 2x+8y=58

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Question 890283: solve by substitution
x+2y=11
2x+8y=58

Answer by mananth(16946) About Me  (Show Source):
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x+2y=11
2x+8y=58

x=11-2y
substitute
2(11-2y)+8y=58

22-4y+8y=58
4y=36
y=9


Plug y in the equation
x+2y=11
x+2*(9)=11
x+18=11
x=-18+11
x=-7