Question: What is the system of substitution for the following problem; 3x-y=11 & 5y-7x=1

Question

anonymous · Answer

I mean by or of substitution!

texaschic101 · Answer

3x - y = 11
3x - 11 = y
now sub 3x - 11 in for y in the other equation

texaschic101 · Answer

are you supposed to solve it ?

anonymous · Answer

Yes, I am. I just got 8x=56 and then you would get x=7!
Then you would plug &chug the 7 into the 3x-11=y!

anonymous · Answer

Then 11=y and then the ordered pair answer is (7,11) and then you should plug and chug again to check if you are right! ( into the pre-existing equations I had trouble with!)

texaschic101 · Answer

5y - 7x = 1
5(3x - 11) - 7x = 1
15x - 55 - 7x = 1
15x - 7x = 1 + 55
8x = 56
x = 7

3x - 11 = y
3(7) - 11 = y
21 - 11 = y
10 = y

check..
5y - 7x = 1
5(10) - 7(7) = 1
50 - 49 = 1
1 = 1 (correct)

answer is : x = 7 and y = 10

you are correct :)

anonymous · Answer

Thank you for helping me with Algebra, I do award you!

texaschic101 · Answer

anytime :)