(x/9) -69 = (3x-63)/900*20
me hope yuno /900*20=20/900
/ & * R at same level, so yu du em from left tu rite...divide bi 900, then multi bi 20
x- 621 = (3x-63)*9/900*20
.... =(3x-63)*9*20/900
...=(3x-63)/5 =(3/5)x -12.6
x=(3/5)x+621-12.6
(2/5)x=608.4
x=(5/2)*608.4
x=1,521