13=z+7

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Solution for 13=z+7 equation:


Simplifying
13 = z + 7

Reorder the terms:
13 = 7 + z

Solving
13 = 7 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
13 + -1z = 7 + z + -1z

Combine like terms: z + -1z = 0
13 + -1z = 7 + 0
13 + -1z = 7

Add '-13' to each side of the equation.
13 + -13 + -1z = 7 + -13

Combine like terms: 13 + -13 = 0
0 + -1z = 7 + -13
-1z = 7 + -13

Combine like terms: 7 + -13 = -6
-1z = -6

Divide each side by '-1'.
z = 6

Simplifying
z = 6

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