(1)4X/8*4/5=3/4
4X/8=15/16
X=15/16*8/4
X=15/8
(2)X+1/12-7X/24=13/21
672X+56-196X=416
476X=360
X=0.756
(3)1/40-3X/11=1/15
165-1800X=440
-1800X=275
X=-0.153
(1)4X/8*4/5=3/4
4X/8=15/16
X=15/16*8/4
X=15/8
(2)X+1/12-7X/24=13/21
672X+56-196X=416
476X=360
X=0.756
(3)1/40-3X/11=1/15
165-1800X=440
-1800X=275
X=-0.153