Question

–5 + 5(–x – 2(x – 4)) = 7(5 – 2x) – x

Answer 1

–5 + 5(–x – 2(x – 4)) = 7(5 – 2x) – x
–5 + 5(–x – 2x + 8) = 35 – 14x – x
-5-5х-10х+40=35-14х-х
-15х+35=-15х+35
-15х+15х=35-35
0х=0
х-любое число

Answer 2

$-5+5(-x-2(x-4))=7(5-2x)-x \ -5+5(-x-2(x-4))=-5+5(-x-2x+8)=-5+5(-3x+8)= \ =-5-15x+40 \ 7(5-2x)-x =35-14x-x=35-15x \ -5-15x+40 =35-15x \ -15x+15x=35+5-40 \ 0x=0$
x - любое число