3z-21=11+7z

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Solution for 3z-21=11+7z equation:


Simplifying
3z + -21 = 11 + 7z

Reorder the terms:
-21 + 3z = 11 + 7z

Solving
-21 + 3z = 11 + 7z

Solving for variable 'z'.

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

Add '-7z' to each side of the equation.
-21 + 3z + -7z = 11 + 7z + -7z

Combine like terms: 3z + -7z = -4z
-21 + -4z = 11 + 7z + -7z

Combine like terms: 7z + -7z = 0
-21 + -4z = 11 + 0
-21 + -4z = 11

Add '21' to each side of the equation.
-21 + 21 + -4z = 11 + 21

Combine like terms: -21 + 21 = 0
0 + -4z = 11 + 21
-4z = 11 + 21

Combine like terms: 11 + 21 = 32
-4z = 32

Divide each side by '-4'.
z = -8

Simplifying
z = -8

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