解方程:(0.3分之x-1)-(0.5分之x+2)=120%

2024-12-12 13:40:11
推荐回答(3个)
回答1:

(x-1)/0.3-(x+2)/0.5=0.12
即 10(x-1)/3-2(x+2)=0.12
等式两边同时乘以3得:10(x-1)-6(x+2)=0.36
化简整理得 4x=2.36
解得 x=0.59

回答2:

现在甲是:
120×2/(2+3)=48
现在乙是:
120×3/(2+3)=72

原来的甲是:
48÷(1-1/3)=72

回答3:

(x/0.3-1)-(x/0.5+2)=120%
x/0.3-1-x/0.5-2=1.2
10x/3-2x-3=1.2
10x-6x-9=3.6
4x=12.6
x=3.15=63/20