Answer:
40-15x=18
Explanation:
Multiply both sides of 2 - 3/4x = 9/10 by twenty to get
20*2 - 20*3/4*x = 20*9/10
which is 40 - 15x = 18
This should be as far as you need to go, but incase you need to go further,
subtract 40 to both sides
multiply both sides by -1 to get rid of the negatives infront of the x
then divide both sides by 15 to get
x=22/15
and yes, when you solve for x, it is a fraction, but just incase if its needed, I included it. Hope this helps in the future! Let me know if any more questions you have on this problem.