125+z+13+z=180

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Solution for 125+z+13+z=180 equation:


Simplifying
125 + z + 13 + z = 180

Reorder the terms:
125 + 13 + z + z = 180

Combine like terms: 125 + 13 = 138
138 + z + z = 180

Combine like terms: z + z = 2z
138 + 2z = 180

Solving
138 + 2z = 180

Solving for variable 'z'.

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

Add '-138' to each side of the equation.
138 + -138 + 2z = 180 + -138

Combine like terms: 138 + -138 = 0
0 + 2z = 180 + -138
2z = 180 + -138

Combine like terms: 180 + -138 = 42
2z = 42

Divide each side by '2'.
z = 21

Simplifying
z = 21

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