问题
解答题
解方程.
5.34+X=30.6
7X=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)7X=17.5
7X÷7=17.5÷7
X=2.5;
(3)X+5X=36
6X=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.
解方程.
5.34+X=30.6
7X=17.5
X+5X=36
X÷0.8=4.5.
(1)5.34+X=30.6
5.34+X-5.34=30.6-5.34
X=25.26;
(2)7X=17.5
7X÷7=17.5÷7
X=2.5;
(3)X+5X=36
6X=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.