1X/4+(180-X)=6/5(180-X)怎么解

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1X/4+(180-X)=6/5(180-X)怎么解
1X/4+(180-X)=6/5(180-X)怎么解

1X/4+(180-X)=6/5(180-X)怎么解
1X/4+(180-X)=6/5(180-X)
乘以20得 5x+20(180-x)=24(180-x)
5x=4(180-x)
5x=720-4x
9x=720
x=80