13.2x+9x=33.3 8X-3X=105 5.4+X=12.8 X-0.36X=16
(13.2+9)x=33.3 5X=105 X=12.8-5.4 (1-0.36)X=16
22.2x=33.3 X=105*5 X=7.4 0.64X=16
x=1.5 X=21 X=25
13.2x+9x=33.3 8X-3X=105 5.4+X=12.8 X-0.36X=16
(13.2+9)x=33.3 5X=105 X=12.8-5.4 (1-0.36)X=16
22.2x=33.3 X=105*5 X=7.4 0.64X=16
x=1.5 X=21 X=25