The letter X in the equation 14 plus X21 would be 2.5. this is a math problem.
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You cannot since it has no solution.
The answer is x = 2.
5
y = x2 + 14x + 21; a = 1, b = 14, c = 21 x-coordinate = -b/2a = -14/2 = -7 if it is y = x2 + 14 + 21, the x-coordinate is zero, since b = 0.
x/11 + 21 = 7 x/11 = -14 x = -154