Question

Three multiplied by the sum of 4 and a number is the same as 18 more than the number. Find the number.

If n is "the number," which equation could be used to solve for the number?

a. 3n + 4 = n + 18

b.4(3 + n) = n + 18

c.3(4 + n) = n + 18

Answer 1

a.3(4 + n) =n + 18

On solving;
12+3n=n+18
3n-n=18-12
3n=6
n=2