(50加70)x=(60加70)乘(x加2)x等于几
问题描述:
(50加70)x=(60加70)乘(x加2)x等于几
答
(50加70)x=(60加70)乘(x加2)
120x=130(x+2)
120x=130x+260
-10x=260
x=-26