x:(320-240)=5:16 2:0.6=10:(x-2) 0.75:3=x:15 07:x=12:24 x:7.5=2.1:1.8 5X:3=10:9
问题描述:
x:(320-240)=5:16 2:0.6=10:(x-2) 0.75:3=x:15 07:x=12:24 x:7.5=2.1:1.8 5X:3=10:9
答
1.x:(320-240)=5:16x:80=5:1616x=5*80x=252.2:0.6=10:(x-2)2*(x-2)=0.6*10x-2=3x=53.0.75:3=x:153x=0.75*15x=3.754.0.7:x=12:24=1:2x=1.45.x:7.5=2.1:1.81.8x=7.5*2.1x=8.756.5X:3=10:95x*9=3*10x=2/3...