Step: 1

Let n be the unknown number.

[Identify the variable.]

Step: 2

[Write the phrase as an equation.]

Step: 3

[Multiply each side by - 3.]

Step: 4

[Simplify.]

Step: 5

The unknown number is - 21.

Correct Answer is : - 21

Step: 1

Let k be the unknown number.

Step: 2

[Write the equation.]

Step: 3

[Add 3 7 on each side.]

Step: 4

[Simplify.]

Step: 5

[Convert improper fraction into mixed number.]

Step: 6

The number is 48 3 7 .

Correct Answer is : 48 3 7

Step: 1

Let a be the another number.

Step: 2

31 + a = 39

[Original equation.]

Step: 3

31 + a - 31 = 39 - 31

[Subtract 31 from each side.]

Step: 4

[Simplify.]

Step: 5

The other number is 8.

Correct Answer is : 8

Step: 1

Let n be the number.

Step: 2

[Write an eqaution.]

Step: 3

[Subtract 2 5 from both sides.]

Step: 4

= 5 - 4 1 0

Step: 5

[Simplify.]

Step: 6

So, the number is 1 10 .

Correct Answer is : 1 10

Step: 1

Let x be the number.

Step: 2

[Write an equation.]

Step: 3

[Subtract 7 3 from each side.]

Step: 4

- x = 33-35 15

[LCD of 5, 3 is 15.]

Step: 5

- x = - 2 15

[Subtract 35 from 33.]

Step: 6

[Multiply each side by -1.]

Step: 7

The number is 2 15 .

Correct Answer is : 2 15

Step: 1

Let k be the unknown number.

Step: 2

[Write the equation.]

Step: 3

[Add 3 7 on each side.]

Step: 4

[Simplify.]

Step: 5

[Convert improper fraction into mixed number.]

Step: 6

The number is 30 3 7 .

Correct Answer is : 30 3 7

Step: 1

Let n be the number.

Step: 2

[Write an eqaution.]

Step: 3

[Subtract 3 7 from both sides.]

Step: 4

= 14-9 21

Step: 5

[Simplify.]

Step: 6

So, the number is 5 21 .

Correct Answer is : 5 21

Step: 1

Let a be the another number.

Step: 2

25 + a = 32

[Original equation.]

Step: 3

25 + a - 25 = 32 - 25

[Subtract 25 from each side.]

Step: 4

[Simplify.]

Step: 5

The other number is 7.

Correct Answer is : 7

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