2x(x-1)-3(3+5x)=2x(x-7)
1. (2x-2)x-3(3+5x)-2x(x-7)=02. 2x^2-2x-3(3+5x)-2x(x-7)=03. 2x^2-2x-(9+15x)-2x(x-7)=04. 2x^2-2x-9-15x-2x(x-7)=05. 2x^2-17x-9-2x(x-7)=06. 2x^2-17x-9-(2x-14)x=0
7. 2x^2-17x-9-(2x^2-14x)=0
8. 2x^2-17x-9-2x^2+14x=0
9. -17x-9+14x=0
10. -3x-9=0