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Bettie Schuster ∙
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7x+7=28x 28x-7x=7 21x=7 x=3
7x = 4x - 93x = -9x = -3
7x - 3 = 3 Subtract 3 from both sides: 7x - 6 = 0 So a = 7 and b = -6
Subtract by 7x and divide by 2.
x=3