QUESTION IMAGE
Question
the steps alana used to solve the equation ( x - 7 = 18 ) are shown.
drag a reason for each step to the table.
| step | reason |
|---|---|
| ( x - 7 + 7 = 18 + 7 ) | |
| ( x + 0 = 18 + 7 ) | |
| ( x = 18 + 7 ) | |
| ( x = 25 ) |
additive property of equality quad addition of real numbers
additive identity property quad given quad additive inverse property
Step1: Identify the first step's reason
The equation \( x - 7 = 18 \) is the original equation, so the reason is "Given".
Step2: Identify the second step's reason
For \( x - 7 + 7 = 18 + 7 \), we add 7 to both sides of the equation. This is the Additive Property of Equality (if \( a = b \), then \( a + c = b + c \)).
Step3: Identify the third step's reason
For \( x + 0 = 18 + 7 \), we use the Additive Inverse Property (\( a + (-a)=0 \), here \( -7 + 7 = 0 \)).
Step4: Identify the fourth step's reason
For \( x = 18 + 7 \), we use the Additive Identity Property (\( a + 0 = a \)).
Step5: Identify the fifth step's reason
For \( x = 25 \), we perform the addition of real numbers (\( 18 + 7 = 25 \)).
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| Step | Reason |
|---|---|
| \( x - 7 + 7 = 18 + 7 \) | Additive Property of Equality |
| \( x + 0 = 18 + 7 \) | Additive Inverse Property |
| \( x = 18 + 7 \) | Additive Identity Property |
| \( x = 25 \) | Addition of Real Numbers |