问题
解答题
解方程
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答案
(1)3.5X+0.5X=12.8,
4X=12.8,
4X÷4=12.8÷4,
X=3.2;
(2)45x÷3=90,
15x=90,
15x÷15=90÷15,
x=6.
(3)(7-1.4)x+5=7.8,
5.6x+5=7.8,
5.6x+5-5=7.8-5,
5.6x÷5.6=2.8÷5.6,
x=0.5.
解方程
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(1)3.5X+0.5X=12.8,
4X=12.8,
4X÷4=12.8÷4,
X=3.2;
(2)45x÷3=90,
15x=90,
15x÷15=90÷15,
x=6.
(3)(7-1.4)x+5=7.8,
5.6x+5=7.8,
5.6x+5-5=7.8-5,
5.6x÷5.6=2.8÷5.6,
x=0.5.