Example

Solving y+37=13y + 37 = -13 Using the Subtraction Property

To solve the equation y+37=13y + 37 = -13, the goal is to isolate the variable yy on one side. Since 3737 is being added to yy, the addition can be undone by applying the Subtraction Property of Equality — subtract 3737 from both sides:

y+3737=1337y + 37 - 37 = -13 - 37

On the left side, 3737=037 - 37 = 0, leaving just yy. On the right side, 1337=50-13 - 37 = -50. This simplifies to y=50y = -50.

To verify the solution, substitute 50-50 back into the original equation: 50+37=13-50 + 37 = -13, which simplifies to 13=13-13 = -13. Since this is a true statement, y=50y = -50 is confirmed as the correct solution.

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Updated 2026-04-21

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