Question

{(x,y): x-3y=4}
x-3y=4
2x-6y=Q

Find Q? I'm sooo confused.

Answer 1

You are given x,y such that (the colon there means such that) x-3y=4. In other words for any x and y youo choose they must satisfy that condition. so if you set x = 2 then you need y such that 2-3y=4 or rearranged (2-4)/(-3) = y. Does this help?

Answer 2

Q = 8?

Answer 3

Yep! It is just the first equation multiplied by 2. Good job!