问题
解答题
求未知数Χ.4%
(6+3Χ)÷2=18 (X-0.4):8=3:2.
答案
(1)(6+3x)÷2=18,
(6+3x)÷2×2=18×2,
6+3x-6=36-6,
3x÷3=30÷3,
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Χ.4%
(6+3Χ)÷2=18 (X-0.4):8=3:2.
(1)(6+3x)÷2=18,
(6+3x)÷2×2=18×2,
6+3x-6=36-6,
3x÷3=30÷3,
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.