xu+3x-7u-21=

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Solution for xu+3x-7u-21= equation:


Simplifying
xu + 3x + -7u + -21 = 0

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

Solving
-21 + -7u + ux + 3x = 0

Solving for variable 'u'.

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

Add '21' to each side of the equation.
-21 + -7u + ux + 21 + 3x = 0 + 21

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

Combine like terms: -21 + 21 = 0
0 + -7u + ux + 3x = 0 + 21
-7u + ux + 3x = 0 + 21

Combine like terms: 0 + 21 = 21
-7u + ux + 3x = 21

Add '-3x' to each side of the equation.
-7u + ux + 3x + -3x = 21 + -3x

Combine like terms: 3x + -3x = 0
-7u + ux + 0 = 21 + -3x
-7u + ux = 21 + -3x

Reorder the terms:
-21 + -7u + ux + 3x = 21 + -3x + -21 + 3x

Reorder the terms:
-21 + -7u + ux + 3x = 21 + -21 + -3x + 3x

Combine like terms: 21 + -21 = 0
-21 + -7u + ux + 3x = 0 + -3x + 3x
-21 + -7u + ux + 3x = -3x + 3x

Combine like terms: -3x + 3x = 0
-21 + -7u + ux + 3x = 0

The solution to this equation could not be determined.

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