Question

5 added to three times of a number gives 20​

Answer 1

5+3x=20

3x=15

x=5

therefore the number is 5

Answer 2

Let the number be 'x'

the equation will be:

3x + 5 = 20

3x = 20 - 5

3x = 15

x = 15/3

x = 5

Hope this helps :)