Solve f(x)=x+4 , f(x)=3x

Math
,
Substitute for .
Move all terms containing to the left side of the equation.
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Subtract from both sides of the equation.
Subtract from .
Divide each term by and simplify.
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Divide each term in by .
Cancel the common factor of .
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Cancel the common factor.
Divide by .
Divide by .
Solve f(x)=x+4 , f(x)=3x

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