If n is a number.
"Five times the sum of a number and 3" is 5*(n+3).
"3 multiplied by 1 less than twice the number" is 3*(2n - 1).
And we have that
5*(n+3) = 3*(2n - 1)
5n + 15 = 6n - 3
5n - 6n = -3 - 15
-n = - 18
n= 18
7.2m questions
9.5m answers