6X + 4 = X + 14
subtract X from each side
6X - X + 4 = X - X + 14
5X + 4 = 14
subtract 4 from each side
5X + 4 - 4 = 14 - 4
5X = 10
divide each sides integer by 5
(5/5)X = 10/5
X = 2
----------------check in original eqiation
6(2) + 4 = 2 + 14
12 + 4 = 2 + 14
16 = 16
---------------------checks
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-6x
If x = 3, (4 x 3) + 14 = 26 and (6 x 3) + 8 = 26.
In 6x + 4 = 12, x = 4/3
If: 2x+6x-4 = 52 Then: x = 7
The discriminant of a quadratic ax2 + bx + c is b2 - 4ac; thus: the discriminant of -9x2 + 6x + 14 is 62 - 4 x -9 x 14 = 540