SOLUTION: x-3y=7 2x-5y=13 solve by substitution

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Question 150377: x-3y=7
2x-5y=13
solve by substitution
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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x - 3y = 7
x = 3y + 7
:
Substitute (3y+7) for x
2x - 5y = 13
2(3y+7) - 5y = 13
6y + 14 = 5y = 13
6y - 5y = 13 - 14
y = -1
:
Find x using the x = 3y + 7
x = 3(-1) + 7
x = -3 + 7
x = + 4
:
Check solutions in the 2nd equation:
2(4) - 5(-1) =
8 + 5 = 13