SOLUTION: Solve the system of equations x + y = 5 x - y = -9

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Question 475956: Solve the system of equations
x + y = 5
x - y = -9
Answer by algebrahouse.com(1659) About Me  (Show Source):
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x + y = 5
x - y = -9
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2x = -4 {added the two equations together}
x = -2 {divided both sides by 2}

x + y = 5 {top equation
-2 + y = 5 {substituted -2, in for x, into top equation}
y = 7 {added 2 to both sides}

x = -2 and y = 7

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