Answer:
x = -7
Explanation:
first distribute he 7 to get 7x + 28 = -21
then subtract 28 from both sides to get 7x = -49
lastly divide 7 from both sides to get x = -7
Answer: x = -7
7 (x + 4) = -21
7x + 28 = -21
Subtract 28 from both sides
7x = -49
Divide both sides by 7
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