Question

Juan noticed that if he takes the opposite of his age and

adds 40, he gets the number 28: How old is Juan? Write
an equation and solve. Use a for his age.

Answer 1

-a + 40 = 28, a = 12

Explanation:

If he takes the opposite of his age, that means the current number is negative. We can get -a + 40 = 28, we can then simplify by subtracting both sides by 40 and getting -a = -12 which is equal to a = 12