(0.2x+0.2x+120)*2+100=x 怎么解
问题描述:
(0.2x+0.2x+120)*2+100=x 怎么解
答
(0.2x+0.2x+120)*2+100=x
(0.4x+120)*2+100=x
0.8x+240+100=x
0.8x+340=x
x-0.8x=340
0.2x=340
x=1700
答
(0.2x+0.2x+120)*2+100=x
0.8x+240+100=x
x-0.8x=340
0.2x=340
x=1700