8z+12z=5z-21

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Solution for 8z+12z=5z-21 equation:


Simplifying
8z + 12z = 5z + -21

Combine like terms: 8z + 12z = 20z
20z = 5z + -21

Reorder the terms:
20z = -21 + 5z

Solving
20z = -21 + 5z

Solving for variable 'z'.

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

Add '-5z' to each side of the equation.
20z + -5z = -21 + 5z + -5z

Combine like terms: 20z + -5z = 15z
15z = -21 + 5z + -5z

Combine like terms: 5z + -5z = 0
15z = -21 + 0
15z = -21

Divide each side by '15'.
z = -1.4

Simplifying
z = -1.4

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