f+4.2=7.9

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Solution for f+4.2=7.9 equation: 


Simplifying
f + 4.2 = 7.9

Reorder the terms:
4.2 + f = 7.9

Solving
4.2 + f = 7.9

Solving for variable 'f'.

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

Add '-4.2' to each side of the equation.
4.2 + -4.2 + f = 7.9 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + f = 7.9 + -4.2
f = 7.9 + -4.2

Combine like terms: 7.9 + -4.2 = 3.7
f = 3.7

Simplifying
f = 3.7

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