问题
解答题
解方程 (1)7.2x÷2=4.32 (2)
(3)x:1.2=3:4. |
答案
(1)7.2x÷2=4.32,
7.2x÷2×2=4.32×2,
7.2x=8.64,
7.2x÷7.2=8.64÷7.2,
x=1.2;
(2)
=x÷0.3,16 2.4
=16 2.4
,x 0.3
2.4x=16×0.3,
2.4x=4.8,
2.4x÷2.4=4.8÷2.4,
x=2;
(3)x:1.2=3:4,
4x=1.2×3,
4x÷4=3.6÷4,
x=0.9.