9x-7z=9x-21u

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Solution for 9x-7z=9x-21u equation:


Simplifying
9x + -7z = 9x + -21u

Reorder the terms:
9x + -7z = -21u + 9x

Add '-9x' to each side of the equation.
9x + -9x + -7z = -21u + 9x + -9x

Combine like terms: 9x + -9x = 0
0 + -7z = -21u + 9x + -9x
-7z = -21u + 9x + -9x

Combine like terms: 9x + -9x = 0
-7z = -21u + 0
-7z = -21u

Solving
-7z = -21u

Solving for variable 'z'.

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

Divide each side by '-7'.
z = 3u

Simplifying
z = 3u

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