Question

Раскройте скобки и упростите:
у-(4х-((у-х)-7х))

Answer 1

y-(4x-(y-x)-7x))
y-(4x-(y-x-7x))
y-(4x-(y-8))
y-(4x-y+8x)
y-(12x-y)
y-12x+y
2y-12x

Answer 2

у-(4х-((у-х)-7х))=
y-4x+((y-x)-7y)=
y-4x+(y-x)-7y=
y-4x+y-x-7x=
2y-12x=
2(y-6x)