(4X-10):(X+10)=2:1怎么解?详细点

问题描述:

(4X-10):(X+10)=2:1怎么解?详细点

(4X-10):(X+10)=2:1
(4x-10): 5x=2:3
10x=12x-30
2x=30
x=15

交叉相乘,2(X+10)=1(4X-10)
2x+20=4x-10
2x-4x=-10-20
-2x=-30
x=15

( 4X-10):(X+10)=2:1
2(x+10)=(4x-10)
2x+20=4x-10
4x-2x=20+10
2x=30
x=30÷2
x=15

(4X-10):(X+10)=2:1
2((x+10)=4x-10
2x+20=4x-10
2x=30
x=15