If -2x +14 = 0, -2x = -14, or x = 7.
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2x - 4x + 3 = 0 -2x + 3 = 0 2x = 3 x = 3/2 = 1.5
x2 - 2x - 13 = 0 x2 - 2x + 1 = 14 (x - 1)2 = 14 x - 1 = ±√14 x = 1 ±√14 x ≈ {4.742, -2.742}
2x-3=4x+9 -2x-12=0 2x=-12 x=-6
2x^2 + 8x + 3 = 0
If: 3x+2y = 5x+2y = 14 Then: 3x+2y = 14 and 5x+2y =14 Subtract the 1st equation from the 2nd equation: 2x = 0 Therefore by substitution the solutions are: x = 0 and y = 7