解方乘:(1)5(X—8)=3X (2)9(2X—3)—2=5(2X—1)(急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.

问题描述:

解方乘:(1)5(X—8)=3X (2)9(2X—3)—2=5(2X—1)
(急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.急用.

x=20
x=3

x=20
x=3

1.5(X-8)=3X
所以:5X-40=3X
所以:5X-3X=40
所以:2X=40
所以:X=20
2.9(2X-3)-2=5(2X-1)
所以:18X-27-2=10X-5
所以:18X-10X=-5+27+2
所以:8X=24
所以:X=3