(150-3X):(150-X)=4:8
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(150-3X):(150-X)=4:8(150-3X):(150-X)=4:8(150-3X):(150-X)=4:8(150-3X):(150-X)=4:84(150-X)=8(150-3X)60
(150-3X):(150-X)=4:8
(150-3X):(150-X)=4:8
(150-3X):(150-X)=4:8
(150-3X):(150-X)=4:8
4(150-X)=8(150-3X)
600-4X=1200-24X
24X-4X=1200-600
20X=600
X=600/20
X=30
8(150-3X)=4(150-X)
5x=150
x=50
150-3X:150-X=4:8
2(150-3X)=150-x
x=30
(150-3X):(150-X) = 4:8
8×(150-3X)=4×(150-X)
1200-24X =600-4X
24X =1200-600
X =600÷24
X =25(依据是比例的基本性质)
(150-3X):(150-X)=4:8
(150-3X):(150-X)=1:2
(150-3X)×2=150-X
300-6x=150-x
5x=150
x=30
(150-3X):(150-X)=4:8
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