3z-z+4z=21

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


Simplifying
3z + -1z + 4z = 21

Combine like terms: 3z + -1z = 2z
2z + 4z = 21

Combine like terms: 2z + 4z = 6z
6z = 21

Solving
6z = 21

Solving for variable 'z'.

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

Divide each side by '6'.
z = 3.5

Simplifying
z = 3.5

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