Question

1. if 5 added to 10 times a number is 195. Step by step

2. 30 Subtract from 60 times a number is 150. Step by step

3. 4 times 1/5 of a number is 80. Step by step.

4. 20 subtract from half of a number is 25. Step by step.
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Answer 1

Given :   5 added to 10 times a number is 195

To Find : Number

Solution:

1

Let say Number is N

5 added to 10 times a number is 195

10 times of number = 10N

5 added = 10N +  5

is 195

Hence 10N + 5 = 195

=> 10N = 190

=> N = 19

Number is 19

2.

30 Subtract from 60 times a number is 150. Step by step

60 times a number = 60N

30 Subtracted = 60N - 30

is 150

=> 60N - 30 = 150

=> 60N = 180

=> N = 3

3.

4 times 1/5 of a number is 80

=> 4 * (N/5) = 80

=> N = 100

20 subtract from half of a number is 25. Step by step.

​N/2 - 20  = 25

=> N/2 = 45

=> N = 90

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Answer 2

$\large{\boxed{\bf{AnswEr}}}$

1) Value of that number is 19.

2) Value of that number is 3.

3) Value of that number is 100.

4) Value of that number is 10.

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$\large{\boxed{\bf{Solution}}}$

1)

Let that number be x

5 added to 10 times the number = 10x + 5

★ According to question :-

• 5 + 10x = 195

➪ 10x = 195 - 5

➪ 10x = 190

➪ x = 190/10

➪ x = 19

Hence, that number is 19.

2)

Let that number be x

30 subtracted from 60 times a number = 60x - 30

★ According to question :-

• 60x - 30 = 150

➪ 60x = 150 + 30

➪ 60x = 180

➪ x = 180/60

➪ x = 3

Hence, that number is 3.

3)

Let that number be x

4 times the 1/5 of a number = 4(x/5)

★ According to question :-

• 4x/5 = 80

➪ 4x = 80 × 5

➪ 4x = 400

➪ x = 400/4

➪ x = 100

Hence, that number is 100.

4)

Let that number be x

20 subtracted from half of the number = x/2 - 20

★ According to question :-

• x/2 - 20 = 25

➪ x/2 = 25 - 20

➪ x/2 = 5

➪ x = 5 × 2

➪ x = 10

Hence, that number is 10.

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