Question

Resolva:
{2x+5y=18
{x=60-y

Answer 1

2x + 5y = 18
x = 60 - y
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2x + 5y = 18
x + y = 60 (*-2)
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2x + 5y = 18
-2x - 2y = -120
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// + 3y = -102
y = -102/3
y = -34

x + y = 60
x - 34 = 60
x = 60 + 34
x = 94

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