SAT Math Practice Question #39306 - SATify | SATify

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SAT Math Practice Question #39306 - SATify | SATify

#39306

roots

substitution

radicals

equations

algebra

functions

easy

30 sec

Calculator OK

The function $f$ is defined by $f (x) = 3 x$ . For what value of $x$ does $f (x) = 18$ ?

A.

6

B.

12

C.

36

D.

81