7-f=3(5-f)

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Solution for 7-f=3(5-f) equation:


Simplifying
7 + -1f = 3(5 + -1f)
7 + -1f = (5 * 3 + -1f * 3)
7 + -1f = (15 + -3f)

Solving
7 + -1f = 15 + -3f

Solving for variable 'f'.

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

Add '3f' to each side of the equation.
7 + -1f + 3f = 15 + -3f + 3f

Combine like terms: -1f + 3f = 2f
7 + 2f = 15 + -3f + 3f

Combine like terms: -3f + 3f = 0
7 + 2f = 15 + 0
7 + 2f = 15

Add '-7' to each side of the equation.
7 + -7 + 2f = 15 + -7

Combine like terms: 7 + -7 = 0
0 + 2f = 15 + -7
2f = 15 + -7

Combine like terms: 15 + -7 = 8
2f = 8

Divide each side by '2'.
f = 4

Simplifying
f = 4

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