C = 9/28 = 0.321
https://www.tiger-algebra.com/drill/3c-3/4=2c/3/
You add the two numbers together and get $98.81
x = 130 is your answer
130 - 20 = 110
Since line E and F are parallel and are straight lines, we know both angles will add up to 180°
110 + 70 = 180