x+1.5x=7500 x-0.85x=3 4x-1.2=74
问题描述:
x+1.5x=7500 x-0.85x=3 4x-1.2=74
答
x+1.5x=7500
2.5x=7500
x=3000
x-0.85x=3
0.15x=3
x=20
4x-1.2=74
4x=74+1.2
4x=75.2
x=9.4