1) -3(4 + 5m - 6n)

2)(-3,1х+7,8у-9,6)×0,1

3)9,38-(-10+5,38)

4)-6,19+(-1,5+5,19)

5)-(a-b)-b

6)-(2,7-a)+(-a+1,8)
Зарание спасибо . Пожалуйста с решением​
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