Пошаговое объяснение:
y-(y-(2g-4))=y-y+(2g-4)=y-y+2g-4=2g-4
(2a+5b)+(8a-11b)=2a+5b+8a-11b=10b-6b
(3x+10y)-(6x+3y)=3x+10y-6x-3y=7y-3x
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Пошаговое объяснение:
y-(y-(2g-4))=y-y+(2g-4)=y-y+2g-4=2g-4
(2a+5b)+(8a-11b)=2a+5b+8a-11b=10b-6b
(3x+10y)-(6x+3y)=3x+10y-6x-3y=7y-3x