Solve the following equation

Explanation

To isolate y, we use the addition property of equality.  We can eliminate -27 on the left side by adding its opposite to both sides.

• The equation to solve
  • The equation to solve
    • -27 + y = -3
  • Add 27 to both sides
    • -27 + y + 27 = -3 + 27
  • The sum of a number and its opposite is zero: -27 + 27 = 0
    • y = 24

Check

• This is the original equation
  • -27 + y = -3
• Substitute 24 for y
  • -27 + 24 = -3
• -3 = -3 (True)

The solution of -27 + y = -3 is 24