How do you solve 7a-3=3+6a

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

If w = 6 units, x = 3 units, and y = 5 units, what is the surface area of the figure? 168 units2 240 units2 144 units2 96 units2

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.