2x(5x-4)-3x(x+6)=7x(x-1)-x

问题描述:

2x(5x-4)-3x(x+6)=7x(x-1)-x

10x²-8x-3x²-18x=7x²-7x-x
-26x=-8x
x=06x(7-x)=36-2x(3x-15)42x-6x²=36-6x²+30x42x-30x=3612x=36x=3