4.2+7z=28

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Solution for 4.2+7z=28 equation: 


Simplifying
4.2 + 7z = 28

Solving
4.2 + 7z = 28

Solving for variable 'z'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 7z = 28 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 7z = 28 + -4.2
7z = 28 + -4.2

Combine like terms: 28 + -4.2 = 23.8
7z = 23.8

Divide each side by '7'.
z = 3.4

Simplifying
z = 3.4

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