X^2+-3x+7x-21=0

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Solution for X^2+-3x+7x-21=0 equation: 


Simplifying
X2 + -3x + 7x + -21 = 0

Reorder the terms:
-21 + X2 + -3x + 7x = 0

Combine like terms: -3x + 7x = 4x
-21 + X2 + 4x = 0

Solving
-21 + X2 + 4x = 0

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 + 4x = 0 + 21

Reorder the terms:
-21 + 21 + X2 + 4x = 0 + 21

Combine like terms: -21 + 21 = 0
0 + X2 + 4x = 0 + 21
X2 + 4x = 0 + 21

Combine like terms: 0 + 21 = 21
X2 + 4x = 21

Add '-4x' to each side of the equation.
X2 + 4x + -4x = 21 + -4x

Combine like terms: 4x + -4x = 0
X2 + 0 = 21 + -4x
X2 = 21 + -4x

Simplifying
X2 = 21 + -4x

Reorder the terms:
-21 + X2 + 4x = 21 + -4x + -21 + 4x

Reorder the terms:
-21 + X2 + 4x = 21 + -21 + -4x + 4x

Combine like terms: 21 + -21 = 0
-21 + X2 + 4x = 0 + -4x + 4x
-21 + X2 + 4x = -4x + 4x

Combine like terms: -4x + 4x = 0
-21 + X2 + 4x = 0

The solution to this equation could not be determined.

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