1.21=.55f+-1.1

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Solution for 1.21=.55f+-1.1 equation:


Simplifying
1.21 = 0.55f + -1.1

Reorder the terms:
1.21 = -1.1 + 0.55f

Solving
1.21 = -1.1 + 0.55f

Solving for variable 'f'.

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

Add '-0.55f' to each side of the equation.
1.21 + -0.55f = -1.1 + 0.55f + -0.55f

Combine like terms: 0.55f + -0.55f = 0.00
1.21 + -0.55f = -1.1 + 0.00
1.21 + -0.55f = -1.1

Add '-1.21' to each side of the equation.
1.21 + -1.21 + -0.55f = -1.1 + -1.21

Combine like terms: 1.21 + -1.21 = 0.00
0.00 + -0.55f = -1.1 + -1.21
-0.55f = -1.1 + -1.21

Combine like terms: -1.1 + -1.21 = -2.31
-0.55f = -2.31

Divide each side by '-0.55'.
f = 4.2

Simplifying
f = 4.2

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