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.

单项选择题
单项选择题