r+o+f+l=4

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Solution for r+o+f+l=4 equation:


Simplifying
r + o + f + l = 4

Reorder the terms:
f + l + o + r = 4

Solving
f + l + o + r = 4

Solving for variable 'f'.

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

Add '-1l' to each side of the equation.
f + l + o + -1l + r = 4 + -1l

Reorder the terms:
f + l + -1l + o + r = 4 + -1l

Combine like terms: l + -1l = 0
f + 0 + o + r = 4 + -1l
f + o + r = 4 + -1l

Add '-1o' to each side of the equation.
f + o + -1o + r = 4 + -1l + -1o

Combine like terms: o + -1o = 0
f + 0 + r = 4 + -1l + -1o
f + r = 4 + -1l + -1o

Add '-1r' to each side of the equation.
f + r + -1r = 4 + -1l + -1o + -1r

Combine like terms: r + -1r = 0
f + 0 = 4 + -1l + -1o + -1r
f = 4 + -1l + -1o + -1r

Simplifying
f = 4 + -1l + -1o + -1r

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