Answer:
x = 5
Step-by-step explanation:
A by B is simply [tex]\frac{A}{B}[/tex]
3 by x + 1 is [tex]\frac{3}{x + 1}[/tex]
5 by 2x is [tex]\frac{5}{2x}[/tex]
So, the equality is ;
[tex]\frac{3}{x + 1}[/tex] = [tex]\frac{5}{2x}[/tex]
Cross multiply and solve the inequality;
3(2x) = 5(x + 1)
6x = 5x + 5
6x -5x = 5
x = 5
