Ответ:
3a-2=7(x+a)
3a-2=7x+7a
x=2, тогда:
3a-2=14+7a
3a-7a=14+2
-4a=16
a=16:(-4)
a=-4
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Ответ:
3a-2=7(x+a)
3a-2=7x+7a
x=2, тогда:
3a-2=14+7a
3a-7a=14+2
-4a=16
a=16:(-4)
a=-4