解方程. X÷0.4=0.12+0.7 4X-0.7=7.3.
问题描述:
解方程.
X÷0.4=0.12+0.7 4X-0.7=7.3.
答
(1)x÷0.4=0.12+0.7, x÷0.4=0.82, x÷0.4×0.4=0.82×0.4, &n...