解方程. 4x-3.6x=36 5(x+1.5)=17.5.

2025-02-23 00:26:40
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回答1:

(1)4x-3.6x=36,
0.4x=36,
0.4x÷0.4=36÷0.4,
x=90;
(2)5(x+1.5)=17.5,
5(x+1.5)÷5=17.5÷5,
x+1.5=3.5,
x+1.5-1.5=3.5-1.5,
x=2.