18z+(-15z)-(-13)=20

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Solution for 18z+(-15z)-(-13)=20 equation:


Simplifying
18z + (-15z) + -1(-13) = 20

Multiply -1 * -13
18z + (-15z) + 13 = 20

Reorder the terms:
13 + 18z + (-15z) = 20

Combine like terms: 18z + (-15z) = 3z
13 + 3z = 20

Solving
13 + 3z = 20

Solving for variable 'z'.

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

Add '-13' to each side of the equation.
13 + -13 + 3z = 20 + -13

Combine like terms: 13 + -13 = 0
0 + 3z = 20 + -13
3z = 20 + -13

Combine like terms: 20 + -13 = 7
3z = 7

Divide each side by '3'.
z = 2.333333333

Simplifying
z = 2.333333333

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