3z=-4z-21

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Solution for 3z=-4z-21 equation: 


Simplifying
3z = -4z + -21

Reorder the terms:
3z = -21 + -4z

Solving
3z = -21 + -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.
3z + 4z = -21 + -4z + 4z

Combine like terms: 3z + 4z = 7z
7z = -21 + -4z + 4z

Combine like terms: -4z + 4z = 0
7z = -21 + 0
7z = -21

Divide each side by '7'.
z = -3

Simplifying
z = -3

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