Answer:
Step-by-step explanation:
multiply both sides by 3x
3[x+40]x[x+40]
3x +120+x(square)+40x
43x+120+x(square)
quadractic equation
x(square)+43x+120
(x+40x+)(3x+120)
x(1+40)3(1+40)
x:3 or 40
