问题 解答题

6.2X-X=41.62X+1.3×4=6.819.5÷3X=2.

答案

(1)6.2X-X=41.6,

(6.2-1)X=41.6,

5.2X=41.6,

5.2X÷5.2=41.6÷5.2,

X=8;

(2)2X+1.3×4=6.8,

2X+5.2=6.8,

2X+5.2-5.2=6.8-5.2,

2X=1.6,

2X÷2=1.6÷2,

X=0.8;

(3)19.5÷3X=2,

19.5÷3X×3X=2×3X,

19.5=6X,

6X÷6=19.5÷6,

X=3.25.

综合
单项选择题