百分数解方程.快.12+60%X=48X-25%X=2430%X=48%X=27(1+40%)X=7
问题描述:
百分数解方程.快.
12+60%X=48
X-25%X=24
30%X=48%X=27
(1+40%)X=7
答
12+60%X=48
0.6x=36
x=60
X-25%X=24
0.75x=24
x=32
30%X=48%X=27
30%X-48%X=27
0.18x=-27
x=-150
(1+40%)X=7
1.4x=7
x=5