Пошаговое объяснение:
5/2:(5/4-5/6)-7/5:7/10=x
5/2:(15/12-10/12)-7/5*10/7=x
5/2*12/5-2=x
6-2=x
x=4
(-16):(9/4+7/4)=y
(-16):(16/4)=y
(-16):4=y
y=-4
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Пошаговое объяснение:
5/2:(5/4-5/6)-7/5:7/10=x
5/2:(15/12-10/12)-7/5*10/7=x
5/2*12/5-2=x
6-2=x
x=4
(-16):(9/4+7/4)=y
(-16):(16/4)=y
(-16):4=y
y=-4