20=3z-4+9z

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Solution for 20=3z-4+9z equation:


Simplifying
20 = 3z + -4 + 9z

Reorder the terms:
20 = -4 + 3z + 9z

Combine like terms: 3z + 9z = 12z
20 = -4 + 12z

Solving
20 = -4 + 12z

Solving for variable 'z'.

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

Add '-12z' to each side of the equation.
20 + -12z = -4 + 12z + -12z

Combine like terms: 12z + -12z = 0
20 + -12z = -4 + 0
20 + -12z = -4

Add '-20' to each side of the equation.
20 + -20 + -12z = -4 + -20

Combine like terms: 20 + -20 = 0
0 + -12z = -4 + -20
-12z = -4 + -20

Combine like terms: -4 + -20 = -24
-12z = -24

Divide each side by '-12'.
z = 2

Simplifying
z = 2

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