Depends on the calculator you have at your disposal. If it's one of the TI-83 series, you can use the built-in 'fnint' function.
https://brownmath.com/ti83/integr.htm
6 : 24 x : 20 Cross multiply.
Answer:
Lets work through it.
1. Distribute values:
2/3x-4=6
2. Move variables to one side
2/3x=10
3.Divide by 2/3 or multiply by 3/2
x=10*1.5
4. Answer=1.5