f(2)=3*2-7

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Solution for f(2)=3*2-7 equation: 


Simplifying
f(2) = 3 * 2 + -7

Reorder the terms for easier multiplication:
2f = 3 * 2 + -7

Multiply 3 * 2
2f = 6 + -7

Combine like terms: 6 + -7 = -1
2f = -1

Solving
2f = -1

Solving for variable 'f'.

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

Divide each side by '2'.
f = -0.5

Simplifying
f = -0.5

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