3x + 4x = 7x
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3x + (-2 + 4x) = -2 + 7x
4x-2y+3x+2y When simplified: 7x
4x + 10 + 3x = 40 - 3x 4x + 10 + 3x + 3x = 40 20x = 40 x = 2
If: 3x+5 = 4x+1 Then: x = 4
12x2 - 7x + 1 = 12x2 - 4x - 3x + 1 = 4x(3x - 1) - 1(3x - 1) = (3x - 1)(4x - 1)