All you have to do is times it by 4
The simpliest way to do this is to turn both fractions into decimals
7/10 goes to 0.7 and 2/5 goes to 0.4
then the equation would be 0.7x + 20 = 0.4
hope I've helped!
11, 13, and 16. sorry if im wrong, and i hope this helps.
