Question

x(3x+2)-9(x²-7x)=6x(10-x)

Answer 1

$3x^{2} +2x-9 x^{2} +63x=60x-6 x^{2}$
$3x^{2} +2x-9 x^{2} +63x+6 x^{2}=60x$
65x=60x
5x=0
x=0

Answer 2

спасибо

Answer 3

3x^2+2x-9x^2+63x=60x-6x^2
3x^2-9x^2+6x^2+2x+63x-60x=0
5x=0
x=0