Question

What number makes the equation true?
31- -12=6

Answer 1

13

Explanation:

The blank space is unknown so we can put in a variable

31 - x - 12 = 6

Then we should try to make it so the variable is on one side and all the numbers on the other

31 - x - 12 = 6

+12 +12

31 - x = 18

-31 -31

-x = -13

×-1 ×-1

x = 13

So your answer would be 13

Answer 2

31-13-12= 6

Explanation: