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?

Answer 1

\[3(n + 4) = n + 18\]Wanna solve that equation.

Answer 2

3 ( 4 + n) = 18 + n
12 + 3n = 18 + n
2n - 6 = 0

Answer 3

2n - 6 = 0//this is the answer

Answer 4

2n - 6 = 0
2n = 0 + 6
2n = 6
2n/2 = 6/2
n = 3

check...
3(n + 4) = n + 18
3(3 + 4) = 3 + 18
3(7) = 21
21 = 21 (correct)

ANSWER : n = 3