35(x-2)+15(5x-6)=500,x=?

问题描述:

35(x-2)+15(5x-6)=500,x=?

35(x-2)+15(5x-6)=500
35X-70+75X-90=500
35X+75X=500+70+90
110X=660
X=6

35x-70+75x-90=500
35x+75x-(70+90)=500
110x=500+160
110x=660
x=660/110
x=6

35(x-2)+15(5x-6)=500
解35X-70+75X-90=500
110X=500+160
X=6

x=6