See attachment for math work and answer.
Yeah y=9
hope this helped even tho I’m kinda late haha
Carmen simplifies the expression and gets the coefficient of y is 10. Thus, the correct option is C.
<h3>What is simplification?</h3>
Simplification is to make something easier to do or understand and to make something less complicated.
Given
Carmen simplifies the expression
.
We can add x term with x, y term with y, and constant with constant.
On simplifying, we have

Thus, the coefficeint of y is 10.
More about the simplification link is given below.
brainly.com/question/12616840
5x-30y=-35
Divide both the side by 5 and we get
x-6y = -7
x = 6y -7