X^2-7x+21=99

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Solution for X^2-7x+21=99 equation:


Simplifying
X2 + -7x + 21 = 99

Reorder the terms:
21 + X2 + -7x = 99

Solving
21 + X2 + -7x = 99

Solving for variable 'X'.

Move all terms containing X to the left, all other terms to the right.

Add '-21' to each side of the equation.
21 + X2 + -21 + -7x = 99 + -21

Reorder the terms:
21 + -21 + X2 + -7x = 99 + -21

Combine like terms: 21 + -21 = 0
0 + X2 + -7x = 99 + -21
X2 + -7x = 99 + -21

Combine like terms: 99 + -21 = 78
X2 + -7x = 78

Add '7x' to each side of the equation.
X2 + -7x + 7x = 78 + 7x

Combine like terms: -7x + 7x = 0
X2 + 0 = 78 + 7x
X2 = 78 + 7x

Simplifying
X2 = 78 + 7x

Reorder the terms:
-78 + X2 + -7x = 78 + 7x + -78 + -7x

Reorder the terms:
-78 + X2 + -7x = 78 + -78 + 7x + -7x

Combine like terms: 78 + -78 = 0
-78 + X2 + -7x = 0 + 7x + -7x
-78 + X2 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
-78 + X2 + -7x = 0

The solution to this equation could not be determined.

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