7z-9z-13=-1

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Solution for 7z-9z-13=-1 equation:


Simplifying
7z + -9z + -13 = -1

Reorder the terms:
-13 + 7z + -9z = -1

Combine like terms: 7z + -9z = -2z
-13 + -2z = -1

Solving
-13 + -2z = -1

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 + -2z = -1 + 13

Combine like terms: -13 + 13 = 0
0 + -2z = -1 + 13
-2z = -1 + 13

Combine like terms: -1 + 13 = 12
-2z = 12

Divide each side by '-2'.
z = -6

Simplifying
z = -6

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