12=7+z

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Solution for 12=7+z equation:


Simplifying
12 = 7 + z

Solving
12 = 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.
12 + -1z = 7 + z + -1z

Combine like terms: z + -1z = 0
12 + -1z = 7 + 0
12 + -1z = 7

Add '-12' to each side of the equation.
12 + -12 + -1z = 7 + -12

Combine like terms: 12 + -12 = 0
0 + -1z = 7 + -12
-1z = 7 + -12

Combine like terms: 7 + -12 = -5
-1z = -5

Divide each side by '-1'.
z = 5

Simplifying
z = 5

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