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Answer :
To solve the equation [tex]\( x + 7 = -9 \)[/tex], we need to find the value of [tex]\( x \)[/tex] that makes the equation true.
Here's a step-by-step solution:
1. Identify the equation:
[tex]\( x + 7 = -9 \)[/tex]
2. Isolate variable [tex]\( x \)[/tex]:
To isolate [tex]\( x \)[/tex], we need to get rid of the [tex]\( +7 \)[/tex] on the left side. We can do this by subtracting 7 from both sides of the equation.
3. Subtract 7 from both sides:
[tex]\( x + 7 - 7 = -9 - 7 \)[/tex]
4. Simplify both sides:
On the left side, [tex]\( +7 \)[/tex] and [tex]\( -7 \)[/tex] cancel each other out, leaving [tex]\( x \)[/tex].
On the right side, [tex]\(-9 - 7\)[/tex] simplifies to [tex]\(-16\)[/tex].
So, we have:
[tex]\[ x = -16 \][/tex]
Therefore, the value of [tex]\( x \)[/tex] that makes the equation [tex]\( x + 7 = -9 \)[/tex] true is:
[tex]\[ \boxed{-16} \][/tex]
The correct answer is:
A. -16
Here's a step-by-step solution:
1. Identify the equation:
[tex]\( x + 7 = -9 \)[/tex]
2. Isolate variable [tex]\( x \)[/tex]:
To isolate [tex]\( x \)[/tex], we need to get rid of the [tex]\( +7 \)[/tex] on the left side. We can do this by subtracting 7 from both sides of the equation.
3. Subtract 7 from both sides:
[tex]\( x + 7 - 7 = -9 - 7 \)[/tex]
4. Simplify both sides:
On the left side, [tex]\( +7 \)[/tex] and [tex]\( -7 \)[/tex] cancel each other out, leaving [tex]\( x \)[/tex].
On the right side, [tex]\(-9 - 7\)[/tex] simplifies to [tex]\(-16\)[/tex].
So, we have:
[tex]\[ x = -16 \][/tex]
Therefore, the value of [tex]\( x \)[/tex] that makes the equation [tex]\( x + 7 = -9 \)[/tex] true is:
[tex]\[ \boxed{-16} \][/tex]
The correct answer is:
A. -16
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