I really need hlp can sumbody anybody hlp please
Let n = the unknown number
Three times the sum of a number (n) and 7 is 45
The sum of the number (n) and 7: n+7
Three times the sum of the number and 7: 3(n+7)
Three times the sum of a number and 7 is 45: 3(n+7)=45
Distribute the 3 across the terms in the parentheses:
3(n + 7) = 45
3n + 21 = 45
Solve for n