解方程 X(1+25%)+(3000-X)(1-25%)=3000×(1+15%)
问题描述:
解方程 X(1+25%)+(3000-X)(1-25%)=3000×(1+15%)
答
1.25x+0.75*3000-0.75x=1.15*3000
(1.25-0.75)x=(1.15-0.75)*3000
0.5x=1200
x=2400
答
X(1+25%)+(3000-X)(1-25%)=3000×(1+15%)
5/4 X+(3000-X)3/4=3450
5/4 X+2250-3/4 X=3450
2/4 X=1200
X=2400