The sum of two is -16 . If one of them is 53 find the other

Answer 1

x+53=-16

x=-16-53=-69

Answer 2

If the sum of two numbers is -16.

Let X be the first number. Let Y be the second number. So the sentence above becomes X + Y = -16

If one of them is 53, lets let it be X. Now we have 53 + Y = -16

Solve for Y by subtracting 53 from both sides.

Y = -69