If 5 times a number is increased by 4, the result is at least 19. find the least possible number that satisfies these conditions?

First let's call this number x, 5 times the number is 5x and if we increase it by 4 it will be 5x+4 . Now, if 5x+4 is at least equal to 19, it means, it can only be equal to 19 and be greater than 19. So if we show this as an inequality :



The least value this expression can have is 19, so let's take 19 as the value and solve.



So the least possible number that satisfies these conditions is 3.

Subtracting is the opposite of adding