(2x+2.5)x4.2=15.54 用方程解
问题描述:
(2x+2.5)x4.2=15.54 用方程解
答
(2x+2.5)x4.2=15.54
2x+2.5=15.54 ÷4.2
2x+2.5=3.7
2x=1.2
x=0.6