0.3x = 45 (solution equation)
x=150
3x: 45 = 60% solution
3x=45*0.6
x=45*0.2
x=9
The solution equation of 45 + x = 1.3x
45+x=1.3x
transposition
45=1.3x-x
45=0.3x
X = 150. I wish you progress in your study,