3z-21=-6+8z

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Solution for 3z-21=-6+8z equation:


Simplifying
3z + -21 = -6 + 8z

Reorder the terms:
-21 + 3z = -6 + 8z

Solving
-21 + 3z = -6 + 8z

Solving for variable 'z'.

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

Add '-8z' to each side of the equation.
-21 + 3z + -8z = -6 + 8z + -8z

Combine like terms: 3z + -8z = -5z
-21 + -5z = -6 + 8z + -8z

Combine like terms: 8z + -8z = 0
-21 + -5z = -6 + 0
-21 + -5z = -6

Add '21' to each side of the equation.
-21 + 21 + -5z = -6 + 21

Combine like terms: -21 + 21 = 0
0 + -5z = -6 + 21
-5z = -6 + 21

Combine like terms: -6 + 21 = 15
-5z = 15

Divide each side by '-5'.
z = -3

Simplifying
z = -3

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