The following is a problem from a SAT practice test:

If 6x + 1/x = 5, then x = ?

- -1/6
- 1/6
- 1/4
- 1/2
- 2

You can try each number but you can also solve the problem on your own first and find the match for your answers.

How is how to solve it:

Multiply both sides of the equal sign with x so the equation becomes:

6x^{2 }+1=5x

6x^{2}-5x+1=0

Factor:

(2x-1)(3x-1)=0

X can be either ½ or 1/3.

The correct answer is D.

The following is a question from a SAT practice test:

The average (arithmetic mean) of 3 numbers is 22 and the smallest of these numbers is 2. If the two remaining numbers are equal, what is the value of each of the remaining numbers?

- 22
- 32
- 40
- 64
- 66

Here is how to solve for the answer:

The average of the 3 numbers is 22 so the sum of them should be:

22 x 3=66

One of the numbers is 2 so the sum of the other two numbers should be:

66-2=64

Since the other two numbers have the same value the value of each number should be:

64÷2=32

The correct answer is B.

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