7x + 1 = x + 7
7(1) + 1 = 8
1 + 7 = 8
If you substitute 1 for x, the statement is true. Therefore, x = 1.
I’ve attached my work below...
Hope this helps!
C cumulative property of multiplication
Answer:
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Step-by-step explanation:

Distribute 2 through the parentheses
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Move constant to right hand side and change it's sign
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Calculate
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Divide both sides of the equation by 12
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Calculate
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Hope I helped!
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X/(-9) = 16
x/(-9) x (-9) = 16(-9)
x = 16(-9)
x = - 144
hope this helps