5x-1=2a-2
5x-2a-2+1
5x=2a-1
x=2/5a-1/5a
Ответ: x=2/5a-1/5a
3x+2=a+5
3x=a+5-2
3x=a+3
x=1/3a+1
Ответ: x=1/3a+1
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5x-1=2a-2
5x-2a-2+1
5x=2a-1
x=2/5a-1/5a
Ответ: x=2/5a-1/5a
3x+2=a+5
3x=a+5-2
3x=a+3
x=1/3a+1
Ответ: x=1/3a+1