解方程:0.12-4.2x=0.04-2.2x-0.2
问题描述:
解方程:0.12-4.2x=0.04-2.2x-0.2
答
0.12 - 0.04 + 0.2 = 4.2x - 2.2x
0.28 = 2x
x = 0.14