解方程.3.5x=42x

解方程.3.5x=42x-7=1.26x=72x÷0.7=4.
2025-02-25 06:25:52
推荐回答(1个)
回答1:

(1)3.5x=42
3.5x÷3.5=42÷3.5
x=12;

(2)x-7=1.2
x-7+7=1.2+7
x=8.2;

(3)6x=72
6x÷6=72÷6
x=12;

(4)x÷0.7=4
x÷0.7×0.7=4×0.7
x=2.8.