问题 解答题
解方程.
5.34+x=30.6

x-2.9=17.5

x+5x=36

x÷0.8=4.5.
答案

(1)5.34+x=30.6,

5.34+x-5.34=30.6-5.34,
x=25.26;

(2)x-2.9=17.5,

x-2.9+2.9=17.5+2.9,

x=20.4;

(3)x+5x=36,

6x÷6=36÷6,

x=6;

(4)x÷0.8=4.5,

x÷0.8×0.8=4.5×0.8,

x=3.6.

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