Answer:
0.75x+2=0.9
Explanation:
To make the fractions into decimals, you divide the numerator by the denominator. So 3/4 would be 3 divide 4, which gets you 0.75. You would do the same with 9/10, dividing 9 and 10, which will get you 0.9. So it'll be 0.75x+2=0.9!