the sum of three times a number? and 7? is equal to two times the number

Question

Write as an equation and solve.

Answer 1

Hi Joe, let's let the "number" equal "n" just to make things easier:

 

 

• 3 times a number -- 3 * n
• Sum -- add
• Sum of 3 times a number and 7 -- 3n + 7
• 2 times the number -- 2 * n

 

Now, let's put it all together:

 

 

3n + 7 = 2n

 

 

 

Combine like terms by subtracting '3n' on both sides:

 

 

7 = -n 

 

 

Divide by -1 to get 'n' by itself:

 

 

n = -7

Answer 2

The sum of
eighteight
and
three timesthree times
a number is
7171.
Find the number