x-0.1x=0.63
0.9x=0.63
x=0.7
(2x/8)+(3x/6)=6
(1/4)x+(1/2)x=6
(1/4)x+(2/4)x=6
(3/4)x=6
x=8
8.8-5(x-0.2)=3.8
8.8-5x+1=3.8
9.8-5x=3.8
5x=6
x=6/5
x-0.1x=0.63
0.9x=0.63
x=0.7
(2x/8)+(3x/6)=6
(1/4)x+(1/2)x=6
(1/4)x+(2/4)x=6
(3/4)x=6
x=8
8.8-5(x-0.2)=3.8
8.8-5x+1=3.8
9.8-5x=3.8
5x=6
x=6/5