Ответ:
x=42, y= -105
Объяснение:
7x + 2y=89
y= -2,5x
7x + 2(-2,5x)= 84
7x - 5x=84
2x=84
x=42
y= -2,5 × 42
y= -105
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Ответ:
x=42, y= -105
Объяснение:
7x + 2y=89
y= -2,5x
7x + 2(-2,5x)= 84
7x - 5x=84
2x=84
x=42
y= -2,5 × 42
y= -105