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SATMathematics Practice Test 1

Question : 1 of 58

Marks: +1, -0

\frac{x-1}{3}=k

k=3

,what is the value of x ?

Solution:

since

k=3

,one can substitute 3 for k in the equation

\frac{x-1}{3}=k

,which gives

\frac{x-1}{3}=3

Multiplying both sides of

\frac{x-1}{3}=3

by 3 given as

x-1=9

and then adding 1 to both sides of

x-1=9

and then adding 1 to both sides of

x-1=9

gives

x=10

Choices A, B, and C are incorrect because the result of subtracting 1 fromthe value and dividing by 3 is not the given value of k, which is 3.

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