X+1/8=180
X=180-1/8
X=179又8分之7
45%X-18=18
45%X=18+18
X=36÷45%
X=80
3/5X-5%X=5.5
(3/5-5%)X=5.5
55%X=5.5
X=5.5÷55%
X=10
25%X+X=60
(25%+1)X=60
125%X=60
X=60÷125%
X=48
X+1/8=180
X=180-1/8
X=179又8分之7
45%X-18=18
45%X=18+18
X=36÷45%
X=80
3/5X-5%X=5.5
(3/5-5%)X=5.5
55%X=5.5
X=5.5÷55%
X=10
25%X+X=60
(25%+1)X=60
125%X=60
X=60÷125%
X=48