3+7z=12

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Solution for 3+7z=12 equation: 


Simplifying
3 + 7z = 12

Solving
3 + 7z = 12

Solving for variable 'z'.

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

Add '-3' to each side of the equation.
3 + -3 + 7z = 12 + -3

Combine like terms: 3 + -3 = 0
0 + 7z = 12 + -3
7z = 12 + -3

Combine like terms: 12 + -3 = 9
7z = 9

Divide each side by '7'.
z = 1.285714286

Simplifying
z = 1.285714286

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