## Example Questions

### Example Question #1901 : Act Math

Find the solution to the following equation if x = 3:

y = (4x2 - 2)/(9 - x2)

6

no possible solution

0

3

no possible solution

Explanation:

Substituting 3 in for x, you will get 0 in the denominator of the fraction. It is not possible to have 0 be the denominator for a fraction so there is no possible solution to this equation.

### Example Question #1 : How To Find Out When An Equation Has No Solution I.  x = 0

II. x = –1

III. x = 1

II only

III only

II and III only

I, II, and III

I only

I only

Explanation: ### Example Question #1 : How To Find Out When An Equation Has No Solution There is no solution

–3

1

3

–1/2

There is no solution

Explanation: ### Example Question #1 : Equations / Inequalities       Explanation:

A fraction is considered undefined when the denominator equals 0. Set the denominator equal to zero and solve for the variable.  ### Example Question #7 : Equations / Inequalities

Solve:       Explanation:

First, distribute, making sure to watch for negatives.  Combine like terms. Subtract 7x from both sides.  ### Example Question #8 : Equations / Inequalities

Solve: No Solution Infinitely Many Solutions  No Solution

Explanation:

First, distribute the to the terms inside the parentheses.   This is false for any value of . Thus, there is no solution.

### Example Question #2 : Equations / Inequalities

Solve .   No solutions No solutions

Explanation:

By definition, the absolute value of an expression can never be less than 0. Therefore, there are no solutions to the above expression.

### Example Question #1 : How To Find Out When An Equation Has No Solution In the above graphic, approximately determine the x values where the graph is neither increasing or decreasing.      We need to find where the graph's slope is approximately zero. There is a straight line between the x values of , and . The other x values have a slope. So our final answer is . 