4z+21=5z

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Solution for 4z+21=5z equation:


Simplifying
4z + 21 = 5z

Reorder the terms:
21 + 4z = 5z

Solving
21 + 4z = 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.
21 + 4z + -5z = 5z + -5z

Combine like terms: 4z + -5z = -1z
21 + -1z = 5z + -5z

Combine like terms: 5z + -5z = 0
21 + -1z = 0

Add '-21' to each side of the equation.
21 + -21 + -1z = 0 + -21

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

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

Divide each side by '-1'.
z = 21

Simplifying
z = 21

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