4(2x-9)-3(x-15)=7(x-1)-2
问题描述:
4(2x-9)-3(x-15)=7(x-1)-2
答
x等于9
答
8X-36-3X+45=7X-7-2
8X-3X-7X=-7-2+36-45
-2X=-18
X=9