40+40%x=60
0.4x=60-40
0.4x=20
x=20/0.4
x=50
(1+20%)x=72
1.2x=72
x=72/1.2
x=60
3x+25%=13
3x+0.25=13
3x=13-0.25
3x=12.75
x=12.75/3
x=4.25
40+40%x=60
0.4x=60-40
0.4x=20
x=20/0.4
x=50
(1+20%)x=72
1.2x=72
x=72/1.2
x=60
3x+25%=13
3x+0.25=13
3x=13-0.25
3x=12.75
x=12.75/3
x=4.25