Question

3. 7 times a number decreased by 3 equal 18. Find the number.
at of
4. One-fifth of a number is 9. Find the number.​

Answer 1

Answer:

Step-by-step explanation:

3)Let the number be x.

7x-3 = 18

7x = 18 + 3

7x = 21

x = 3 .

Therefore, The required number is 3

4)Let the number be x.

One fifth = 1/5

According to the given condition

1/5x = 9

x/5 = 9

x = 9 × 5

x = 45

The Number is 45.

Answer 2

Answer of 3.

Given -

7 times a number decreased by 3 equal to 18

Let, the Number be x.

According to question, Equation

=> 7x - 3 = 18

=> 7x = 18 + 3

=> 7x = 21

=> x = 21/7

=> x = 3

Answer of 4.

Given -

One-fifth of a number is 9

Let, the number be x.

According to question, Equation

=> $\frac{1}{5}x=9$

=> $\frac{x}{5}=9$

=> x = 5 * 9

=> x = 45