-28=13z-9z

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Solution for -28=13z-9z equation:


Simplifying
-28 = 13z + -9z

Combine like terms: 13z + -9z = 4z
-28 = 4z

Solving
-28 = 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
-28 + -4z = 4z + -4z

Combine like terms: 4z + -4z = 0
-28 + -4z = 0

Add '28' to each side of the equation.
-28 + 28 + -4z = 0 + 28

Combine like terms: -28 + 28 = 0
0 + -4z = 0 + 28
-4z = 0 + 28

Combine like terms: 0 + 28 = 28
-4z = 28

Divide each side by '-4'.
z = -7

Simplifying
z = -7

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