Question

I need help its math

Answer 1

Evaluate the left hand side first:

`4\cdot 45 + 3r = 180+3r`

So, the equation is

`180+3r =336`

Subtract 180 from both sides:

`3r = 336-180 = 156`

Finally, divide both sides by 3:

`r = (156)/(3) = 52`