Posted by **Alicia** on Thursday, February 14, 2013 at 10:20pm.

explain how you solve 11x=3y=12 using 3x=9 as subsitution

- algebra -
**Reiny**, Friday, February 15, 2013 at 12:22am
I have a feeling you meant:

11x + 3y = 12 (the + and = are the same key)

for 3x = 9 ---> x = 3

then ...

11(3) + 3y = 12

3y = 12-33

3y = -21

y = -7

x = 3 , y = -7

- algebra -
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