4=-9(f+1)

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Solution for 4=-9(f+1) equation: 


Simplifying
4 = -9(f + 1)

Reorder the terms:
4 = -9(1 + f)
4 = (1 * -9 + f * -9)
4 = (-9 + -9f)

Solving
4 = -9 + -9f

Solving for variable 'f'.

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

Add '9f' to each side of the equation.
4 + 9f = -9 + -9f + 9f

Combine like terms: -9f + 9f = 0
4 + 9f = -9 + 0
4 + 9f = -9

Add '-4' to each side of the equation.
4 + -4 + 9f = -9 + -4

Combine like terms: 4 + -4 = 0
0 + 9f = -9 + -4
9f = -9 + -4

Combine like terms: -9 + -4 = -13
9f = -13

Divide each side by '9'.
f = -1.444444444

Simplifying
f = -1.444444444

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