# EQUATIONS WITH NO SOLUTION AND IDENTITY WORKSHEET

Equations with No Solution and Identity Worksheet :

Worksheet given in this section will be much useful for the students who would like to practice problems solving equations with infinitely many solutions or no solution.

Before look at the worksheet, if you would like to learn about the equations with infinitely many solutions or no solution,

## Equations with No Solution and Identity Worksheet - Problems

Problem 1 :

Solve the following equation :

2(1 - x) + 5x  =  3(x + 1)

Problem 2 :

Solve the following equation :

(1/2)(8y - 6)  =  5y - (y + 3)

Problem 3 :

Solve the following equation :

(1/3)(9 - 6x)  =  5 - 2x

Problem 4 :

(1/3)(15 - 6x)  =  5 - ax

If the linear equation above is an identity, what is the value of a ?

Problem 5 :

4x + 13  =  7(x - 2) + bx

If the linear equation above has no solution, what is the value of b ?

## Equations with No Solution and Identity Worksheet - Solutions

Problem 1 :

Solve the following equation :

2(1 - x) + 5x  =  3(x + 1)

Solution :

2(1 - x) + 5x  =  3(x + 1)

Simplify both sides.

2 - 2x + 5x  =  3x + 3

2 + 3x  =  3x + 3

Subtract 3x from each side.

2  =  3

The above result is false. Because 2 is not equal to 3. Because the result we get at the last step is false, the given equation has no solution.

Problem 2 :

Solve the following equation :

(1/2)(8y - 6)  =  5y - (y + 3)

Solution :

(1/2)(8y - 6)  =  5y - (y + 3)

Simplify both sides.

4y - 3  =  5y - y - 3

4y - 3  =  4y - 3

Subtract 4y from each side.

-3  =  -3

The above result is true. Because the result we get at the last step is true, the given equation has infinitely has many solutions.

Problem 3 :

Solve the following equation :

(1/3)(9 - 6x)  =  5 - 2x

Solution :

(1/3)(9 - 6x)  =  5 - 2x

Simplify.

3 - 2x  =  5 - 2x

3  =  5

The above result is true. Because the result we get at the last step is true, the given equation has infinitely has many solutions.

Problem 4 :

(1/3)(15 - 6x)  =  5 - ax

If the linear equation above is an identity, what is the value of a ?

Solution :

(1/3)(15 - 6x)  =  5 - ax

Simplify.

5 - 2x  =  5 - ax

Because the given equation is an identity, the coefficients of like terms on both sides must be equal.

That is, coefficients of 'x' terms on the left side and right side must be equal.

So, equate the coefficients of 'x'.

- 2  =  - a

Multiply each side by (-1).

2  =  a

If the given linear equation is an identity, the value of a is 2.

Problem 5 :

4x + 13  =  7(x - 2) + bx

If the linear equation above has no solution, what is the value of b ?

Solution :

4x + 13  =  7(x - 2) + bx

Simplify.

4x + 13  =  7x - 14 + bx

4x + 13  =  bx + 7x - 14

4x + 13  =  (b + 7)x - 14

If (b + 7)  =  4, we have

4x + 13  =  4x - 14

Subtract 4x from each side.

13  =  -14

The above result is false. Because 13 is not equal to -14.

If (b + 7)  =  4, the result we get is false and the given equation has no solution.

Solve for b in 'b + 7  =  4'.

b + 7  =  4

Subtract 7 from each side.

b  =  -3

If the given linear equation has no solution, the value of b is -3.

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