It is equal to
21x
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10
simplify it, 7x-12=x+2+2x-3x 7x=2+12+3x-3x 7x=14 x=2
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
3x/4 + x = 7x/4 because 4x/4 = x 3x/4 + 4x/4 = 7x/4
7x - 9 = 3x + 5 7x - 3x - 9 = 5 7x - 3x = 5 + 9 4x = 14 x = 14/4