Three times a the sum of a number and 7 is 45

Question

I really need hlp can sumbody anybody hlp please

Answer 1

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