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7x + 7 = 7(x + 1)
7x+7=28x 28x-7x=7 21x=7 x=3
In 7x+7, x is a variable.
7x + 2 = -4 7x + 2 - 2 = -4 - 2 7x = -6 7x/7 = -6/7 x = -6/7
8x=7x-7 x=-7