(1)(1-25%)x=72 (2)x-40%x=5.04
0.75x=72 0.6x=5.04
x=96 x=8.4
(3)x÷(1-40%)=3.6
x/0.6=3.6
x=2.16
(4) 34 x-25%x=12
33.75x=12
x=0.355
(1)(1-25%)x=72 (2)x-40%x=5.04
0.75x=72 0.6x=5.04
x=96 x=8.4
(3)x÷(1-40%)=3.6
x/0.6=3.6
x=2.16
(4) 34 x-25%x=12
33.75x=12
x=0.355