f(3)=9+2(3)-1

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Solution for f(3)=9+2(3)-1 equation: 


Simplifying
f(3) = 9 + 2(3) + -1

Reorder the terms for easier multiplication:
3f = 9 + 2(3) + -1

Multiply 2 * 3
3f = 9 + 6 + -1

Combine like terms: 9 + 6 = 15
3f = 15 + -1

Combine like terms: 15 + -1 = 14
3f = 14

Solving
3f = 14

Solving for variable 'f'.

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

Divide each side by '3'.
f = 4.666666667

Simplifying
f = 4.666666667

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