If: 3x+5 = 4x+1
Then: x = 4
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3x = 7-4x 3x+4x = 7 7x = 7 x = 1
12x2 - 7x + 1 = 12x2 - 4x - 3x + 1 = 4x(3x - 1) - 1(3x - 1) = (3x - 1)(4x - 1)
3x = 7 - 4x 3x + 4x = 7 - 4x + 4x 7x = 7 7x/7 = 7/7 x = 1
x = -½
(2, 1)