20-8=-3z+9z

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Solution for 20-8=-3z+9z equation:


Simplifying
20 + -8 = -3z + 9z

Combine like terms: 20 + -8 = 12
12 = -3z + 9z

Combine like terms: -3z + 9z = 6z
12 = 6z

Solving
12 = 6z

Solving for variable 'z'.

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

Add '-6z' to each side of the equation.
12 + -6z = 6z + -6z

Combine like terms: 6z + -6z = 0
12 + -6z = 0

Add '-12' to each side of the equation.
12 + -12 + -6z = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -6z = 0 + -12
-6z = 0 + -12

Combine like terms: 0 + -12 = -12
-6z = -12

Divide each side by '-6'.
z = 2

Simplifying
z = 2

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