-21-9*z=8-4*z

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Solution for -21-9*z=8-4*z equation:


Simplifying
-21 + -9z = 8 + -4z

Solving
-21 + -9z = 8 + -4z

Solving for variable 'z'.

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

Add '4z' to each side of the equation.
-21 + -9z + 4z = 8 + -4z + 4z

Combine like terms: -9z + 4z = -5z
-21 + -5z = 8 + -4z + 4z

Combine like terms: -4z + 4z = 0
-21 + -5z = 8 + 0
-21 + -5z = 8

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

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

Combine like terms: 8 + 21 = 29
-5z = 29

Divide each side by '-5'.
z = -5.8

Simplifying
z = -5.8

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