The solution set of X-1 whose absolute value is greater than - 3 -10> - 4 do you want to change the sign by drawing out the minus sign

The solution set of X-1 whose absolute value is greater than - 3 -10> - 4 do you want to change the sign by drawing out the minus sign

{x | x belongs to R}. The other one needs to change sign. When both sides of inequality multiply by negative sign, we must change sign!