-6z+(-3z)-(-13z)=-20

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Solution for -6z+(-3z)-(-13z)=-20 equation: 


Simplifying
-6z + (-3z) + -1(-13z) = -20

Remove parenthesis around (-13z)
-6z + (-3z) + -1 * -13z = -20

Multiply -1 * -13
-6z + (-3z) + 13z = -20

Combine like terms: -6z + (-3z) = -9z
-9z + 13z = -20

Combine like terms: -9z + 13z = 4z
4z = -20

Solving
4z = -20

Solving for variable 'z'.

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

Divide each side by '4'.
z = -5

Simplifying
z = -5

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