Answer:
u = 0
Explanation:
7(U + 4) = 28 Distribute the 7
7u + 28 = 28 Subtract 28 from both sides
7u = 0 Divide both sides by 7
7(u - 4) = 28
7u - 28 = 28
+28 +28
7u = 56
÷7 ÷7
u = 8
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