Question

Answer 1

`a. x = 232 - 123 = 109`

`b, 2^4 <= 2^x <= 2^10`

`-> x = 4, 5, ..., 10`

`c, 49 - 13 + 4x = 40`

`4x = 4`

`-> x = 1`

Answer 2

6: =>x+123=232

=>x=109

7: =>4<=x<=10

=>\(x\in\left\{4;5;6;...;8;9;10\right\}\)

8: =>(4x+13)=49-5x8=9

=>4x=-4

hay x=-1