Question

c1)
(x-y igual 5
(2x mais 3y igual -55

Answer 1

x -y = 5                x(-2)
2x + 3y = -55
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-2x + 2y = -10
2x + 3y = -55
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5y = -65
y = -65/5
y = 13

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x - y = 5
x - 13 = 5
x = 5 -13
x = -8