Question

?.4 + 7 = ? +16

I’m thinking of a number.
When this number is multiplied by 4 and added to 7
It equals the sum of that same 16.
What is the number?

Answer 1

3

Explanation:

(? * 4) + 7 = ? + 16

-? -? (subtract a "?" on both sides)

4? - ? + 7 = 16

3? + 7 = 16

-7 -7 (subtract 7 on both sides)

3? = 9

/3 /3 (divide by 3 on both sides)

? = 3