Solve for f
f=9
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3f-5f+20=2
Use the distributive property to multiply -5 by f-4.
-2f+20=2
Combine 3f and -5f to get -2f.
-2f=2-20
Subtract 20 from both sides.
-2f=-18
Subtract 20 from 2 to get -18.
f=\frac{-18}{-2}
Divide both sides by -2.
f=9
Divide -18 by -2 to get 9.
Examples
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\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
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Limits
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