3z-21=-30+2z

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Solution for 3z-21=-30+2z equation:


Simplifying
3z + -21 = -30 + 2z

Reorder the terms:
-21 + 3z = -30 + 2z

Solving
-21 + 3z = -30 + 2z

Solving for variable 'z'.

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

Add '-2z' to each side of the equation.
-21 + 3z + -2z = -30 + 2z + -2z

Combine like terms: 3z + -2z = 1z
-21 + 1z = -30 + 2z + -2z

Combine like terms: 2z + -2z = 0
-21 + 1z = -30 + 0
-21 + 1z = -30

Add '21' to each side of the equation.
-21 + 21 + 1z = -30 + 21

Combine like terms: -21 + 21 = 0
0 + 1z = -30 + 21
1z = -30 + 21

Combine like terms: -30 + 21 = -9
1z = -9

Divide each side by '1'.
z = -9

Simplifying
z = -9

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