Which property was used to solve the following equation?
x+9=15
- 9 -9
x = 6
Subtraction Property of Equality
Addition Property of Equality
Multiplication Property of Equality
Commutative Property of Equality
Subtraction Property of Equality
The property that was used to solve the equation x+9=15 is the Subtraction Property of Equality.
The property used to solve the equation x + 9 = 15 was the Subtraction Property of Equality.
To solve this equation, the goal is to isolate the variable x on one side of the equation. Here's how it was done:
1. The equation x + 9 = 15 is given.
2. To isolate x, we need to eliminate the 9 on the left side of the equation. We can do this by using the Subtraction Property of Equality, which states that subtracting the same number from both sides of an equation keeps it balanced.
3. Subtracting 9 from both sides gives us x + 9 - 9 = 15 - 9, which simplifies to x = 6.
4. Therefore, the value of x that satisfies the equation is 6.
In this case, we used the Subtraction Property of Equality to subtract 9 from both sides of the equation in order to isolate the variable x.