Ответ:
2x+8y=66
2x=66-8y
x=33-4y.
3x-3y=-6
3x=-6+3y
x=-2+y.
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Ответ:
2x+8y=66
2x=66-8y
x=33-4y.
3x-3y=-6
3x=-6+3y
x=-2+y.