4.2+7*z=2.8

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Solution for 4.2+7*z=2.8 equation: 


Simplifying
4.2 + 7z = 2.8

Solving
4.2 + 7z = 2.8

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 = 2.8 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 7z = 2.8 + -4.2
7z = 2.8 + -4.2

Combine like terms: 2.8 + -4.2 = -1.4
7z = -1.4

Divide each side by '7'.
z = -0.2

Simplifying
z = -0.2

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