2x + 4 = 14 (subtract 4 from both sides)
2x = 10 (divide both sides by 2)
x = 5
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If -2x +14 = 0, -2x = -14, or x = 7.
x = 0 and y = 4
It is a linear equation in x. The equation has the solution x = 0.
2x + y = 25 x + y = 14 Subtract second equation from the first: x = 11 Substitute this value of x in the second equation: 11 + y = 14 ie y = 3
2x - 14 = -2, adding 14 to each side gives 2x = 14 - 2 = 12, dividing each side by 2 gives x = 12/2 Thus x = 6