3z+21=5z-13

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Solution for 3z+21=5z-13 equation:


Simplifying
3z + 21 = 5z + -13

Reorder the terms:
21 + 3z = 5z + -13

Reorder the terms:
21 + 3z = -13 + 5z

Solving
21 + 3z = -13 + 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 + 3z + -5z = -13 + 5z + -5z

Combine like terms: 3z + -5z = -2z
21 + -2z = -13 + 5z + -5z

Combine like terms: 5z + -5z = 0
21 + -2z = -13 + 0
21 + -2z = -13

Add '-21' to each side of the equation.
21 + -21 + -2z = -13 + -21

Combine like terms: 21 + -21 = 0
0 + -2z = -13 + -21
-2z = -13 + -21

Combine like terms: -13 + -21 = -34
-2z = -34

Divide each side by '-2'.
z = 17

Simplifying
z = 17

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