-13f-4(-3f+13)=-5f+20

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Solution for -13f-4(-3f+13)=-5f+20 equation:


Simplifying
-13f + -4(-3f + 13) = -5f + 20

Reorder the terms:
-13f + -4(13 + -3f) = -5f + 20
-13f + (13 * -4 + -3f * -4) = -5f + 20
-13f + (-52 + 12f) = -5f + 20

Reorder the terms:
-52 + -13f + 12f = -5f + 20

Combine like terms: -13f + 12f = -1f
-52 + -1f = -5f + 20

Reorder the terms:
-52 + -1f = 20 + -5f

Solving
-52 + -1f = 20 + -5f

Solving for variable 'f'.

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

Add '5f' to each side of the equation.
-52 + -1f + 5f = 20 + -5f + 5f

Combine like terms: -1f + 5f = 4f
-52 + 4f = 20 + -5f + 5f

Combine like terms: -5f + 5f = 0
-52 + 4f = 20 + 0
-52 + 4f = 20

Add '52' to each side of the equation.
-52 + 52 + 4f = 20 + 52

Combine like terms: -52 + 52 = 0
0 + 4f = 20 + 52
4f = 20 + 52

Combine like terms: 20 + 52 = 72
4f = 72

Divide each side by '4'.
f = 18

Simplifying
f = 18

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