140r-28r-4f=216

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Solution for 140r-28r-4f=216 equation:


Simplifying
140r + -28r + -4f = 216

Reorder the terms:
-4f + 140r + -28r = 216

Combine like terms: 140r + -28r = 112r
-4f + 112r = 216

Solving
-4f + 112r = 216

Solving for variable 'f'.

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

Add '-112r' to each side of the equation.
-4f + 112r + -112r = 216 + -112r

Combine like terms: 112r + -112r = 0
-4f + 0 = 216 + -112r
-4f = 216 + -112r

Divide each side by '-4'.
f = -54 + 28r

Simplifying
f = -54 + 28r

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