4z=21+z

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Solution for 4z=21+z equation: 


Simplifying
4z = 21 + z

Solving
4z = 21 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
4z + -1z = 21 + z + -1z

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

Combine like terms: z + -1z = 0
3z = 21 + 0
3z = 21

Divide each side by '3'.
z = 7

Simplifying
z = 7

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