Question

I need some help on some problems. Medals will be given if desired.

Answer 1

(x+4)/3=8

(x+4)/3*3=8*3 <--- multiply both sides by 3

x+4=24

x+4-4=24-4 <--- subtract 4 from both sides

x=20

So, the last option: (3*8)-4=24-4=20