Question

if 10 be added to four times a certain number and the result is 5 less then the number and 5 times a number . find the number

Answer 1

Let,
The number be x
Then,
x+4×10
=x+40
If the result is 5 less than the 5 times of number
Then the number be
5x=x+40+5
=>5x=x+45
=>5x-x=45
=>4x=45
=>x=45/4
=>x=11.25