Question

8х-(7х+8)=9 4+8у+8=2у-(10+7у)+9
уравнения решить

Answer 1

8x-(7x+8)=9
8x-7x-8=9
8x-7x=9+8
x=17
________________
4+8y+8=2y-(10+7y)+9
4+8y+8=2y-10-7y+9
8y-2y+7y=-10+9-4-8
13y=-13
y=-1