问题
解答题
解方程.
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答案
(1)X÷5=4,
X÷5×5=4×5,
X=20;
(2)68+X=70,
68+X-68=70-68,
X=2;
(3)2X=46,
2X÷2=46÷2,
X=23;
(4)X÷3=50
X÷3×3=50×3,
X=150;
(5)5X=15,
5X÷5=15÷5,
X=3;
(6)X-54=20,
X-54+54=20+54,
X=74.
解方程.
|
(1)X÷5=4,
X÷5×5=4×5,
X=20;
(2)68+X=70,
68+X-68=70-68,
X=2;
(3)2X=46,
2X÷2=46÷2,
X=23;
(4)X÷3=50
X÷3×3=50×3,
X=150;
(5)5X=15,
5X÷5=15÷5,
X=3;
(6)X-54=20,
X-54+54=20+54,
X=74.