F(21)=-6(21)-3

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Solution for F(21)=-6(21)-3 equation: 


Simplifying
F(21) = -6(21) + -3

Reorder the terms for easier multiplication:
21F = -6(21) + -3

Multiply -6 * 21
21F = -126 + -3

Combine like terms: -126 + -3 = -129
21F = -129

Solving
21F = -129

Solving for variable 'F'.

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

Divide each side by '21'.
F = -6.142857143

Simplifying
F = -6.142857143

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