8x-9=21+5z

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Solution for 8x-9=21+5z equation: 


Simplifying
8x + -9 = 21 + 5z

Reorder the terms:
-9 + 8x = 21 + 5z

Solving
-9 + 8x = 21 + 5z

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 8x = 21 + 9 + 5z

Combine like terms: -9 + 9 = 0
0 + 8x = 21 + 9 + 5z
8x = 21 + 9 + 5z

Combine like terms: 21 + 9 = 30
8x = 30 + 5z

Divide each side by '8'.
x = 3.75 + 0.625z

Simplifying
x = 3.75 + 0.625z

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