问题
解答题
求未知数X.
(1)4X-1.6X=24
(2)(X-0.4):8=3:2.
答案
(1)4x-1.6x=24,
2.4x=24,
2.4x÷2.4=24÷2.4,
x=10;
(2)(x-0.4):8=3:2,
2(x-0.4)=8×3,
2(x-0.4)÷2=24÷2,
x-0.4+0.4=12+0.4,
x=12.4;
求未知数X.
(1)4X-1.6X=24
(2)(X-0.4):8=3:2.
(1)4x-1.6x=24,
2.4x=24,
2.4x÷2.4=24÷2.4,
x=10;
(2)(x-0.4):8=3:2,
2(x-0.4)=8×3,
2(x-0.4)÷2=24÷2,
x-0.4+0.4=12+0.4,
x=12.4;