10-x(5-(6+x))=x(x+3)-4x

Question

10-x(5-(6+x))=x(x+3)-4x

Answer 1

10-5x+6x+x^2=x^2+3x-4x
6x-5x+x^2-x^2-3x+4x=-10
2x=-10
x=-5

Answer 2

10-х+30+5х=х*2+3х-4х =10+30=х-5х+х*2+3х-4х