问题
解答题
解方程.
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答案
(1)8+x=15,
8+x-8=15-8,
x=7;
(2)x÷2.5=4,
x÷2.5×2.5=4×2.5,
x=10;
(3)5x=8.5,
5x÷5=8.5÷5,
x=1.7;
(4)x-3.5=0.1,
x-3.5+3.5=0.1+3.5,
x=3.6.
解方程.
|
(1)8+x=15,
8+x-8=15-8,
x=7;
(2)x÷2.5=4,
x÷2.5×2.5=4×2.5,
x=10;
(3)5x=8.5,
5x÷5=8.5÷5,
x=1.7;
(4)x-3.5=0.1,
x-3.5+3.5=0.1+3.5,
x=3.6.