Question

5)5x-(4x-23)=67; 6)(13-x)-4=3; 7)34+(x+12)=79;

Answer 1

5x-4x+23=67
5)5x-(4x-23)=67
5x-4x+23=67
x=67-23
x=44
6)(13-x)-4=3
13+x-4=3
x=-13+4+3
x=-6
7)34+(x+12)=79
34+x+12=79
x=79-34-12
x=33