4 / x - 2 > 5
4 / x > 5 + 2
4 / x > 7 Multiply both sides with x
4 > 7 x Divide both sides with 7
4 / 7 > x
This mean:
x < 4 / 7
x must be > 0 besouse in expresion:
4 / x - 2 > 5
4 / 0 = undefined
So solution are:
0 < x < 4 / 7
i am trying to solve 4/x-2>5. i use calculator and mistakenly type of digit if other than 5. when i type in the problem ,so i get the wrong solution my answer was 2<x<y. what did i mistakenly type in?
2 answers
For negative numbers 4 / x - 2 is always negative so negative numbers can´t be sloutions.