Line Q is represented by the following equation: 2x + y = 11

Which equation completes the system that is satisfied by the solution (3, 5)?
A. x + 2y = 15
B. x + y = 15
C. x + y = 8
D. x − y = 2

Question

Line Q is represented by the following equation: 2x + y = 11

Which equation completes the system that is satisfied by the solution (3, 5)?
A. x + 2y = 15 
B. x + y = 15 
C. x + y = 8 
D. x − y = 2

anonymous · Answer

@ayeshaafzal221

anonymous · Answer

would it be C?

anonymous · Answer

hw did u come up with this answer?

anonymous · Answer

did u solve each eq simultaneously, because when u do when u get x or y value same as (3,5) that equation will be ur answer

anonymous · Answer

btw ur answer is right

anonymous · Answer

I get how to substitute the numbers but i dont fully understand how to answer the question. Am i simplifying?

anonymous · Answer

no its a very long question basically u solve each eq simultaneously with original eq "2x+y=11"

anonymous · Answer

it would end up being 2x3 + 5 = 11 so how to the answer choices come up?

anonymous · Answer

2x+y=11
x+y=8

2x+y=11
-2(x+y=8)

2x+y=11
-2x-2y=-16

-y=-5
y=5

anonymous · Answer

like this ^

anonymous · Answer

but if u want shorter way u can sub ur value ur right

anonymous · Answer

ah, well thanks.