1.Решите уравнение: а)-3x+10x= -13 -15
б)9x-7x= 14-36
в)5x-7x= -35+37
г)-2x-11x= -47+8
2.Упростите выражение:
а)8b-(b-6)8
б)-15a+3(7-5a)
в)9(2y-1)-3(2+5y)-(y-4)
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