解方程: 9x-1.8=5.4; x-0.5x=0.5.
问题描述:
解方程:
9x-1.8=5.4; x-0.5x=0.5.
答
(1)9x-1.8=5.4
9x-1.8+1.8=5.4+1.8
9x=7.2
9x÷9=7.2÷9
x=0.8
(2)x-0.5x=0.5
0.5x=0.5
0.5x÷0.5=0.5÷0.5
x=1.