z+7=20

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Solution for z+7=20 equation: 


Simplifying
z + 7 = 20

Reorder the terms:
7 + z = 20

Solving
7 + z = 20

Solving for variable 'z'.

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

Add '-7' to each side of the equation.
7 + -7 + z = 20 + -7

Combine like terms: 7 + -7 = 0
0 + z = 20 + -7
z = 20 + -7

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

Simplifying
z = 13

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