4z-21=-3z

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


Simplifying
4z + -21 = -3z

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

Solving
-21 + 4z = -3z

Solving for variable 'z'.

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

Add '3z' to each side of the equation.
-21 + 4z + 3z = -3z + 3z

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

Combine like terms: -3z + 3z = 0
-21 + 7z = 0

Add '21' to each side of the equation.
-21 + 21 + 7z = 0 + 21

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

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

Divide each side by '7'.
z = 3

Simplifying
z = 3

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