问题
解答题
解方程:
8X=242.4+8a=165.5X÷6=113.6X+2.4X=10.8.
答案
(1)8X=24,
8X÷8=24÷8,
X=3;
(2)2.4+8a=16,
2.4+8a-2.4=16-2.4,
8a=13.6,
8a÷8=13.6÷8,
a=1.7;
(3)5.5X÷6=11,
5.5X÷6×6=11×6,
5.5X=66,
5.5X÷5.5=66÷5.5,
X=12;
(4)3.6X+2.4X=10.8,
(3.6+2.4)X=10.8,
6X=10.8,
6X÷6=10.8÷6,
X=18.