Ok. First you isolate the variable. So Ill take 12 which is posotive, and subtract 12 from the 15 and the 12. Now all were left with is -x=3. We multiply each side by -1 to give us x=-3. Hope this helps!
Answer:
Step-by-step explanation:
The Variables are X & Y
The Coefficients are 1/4 & 3
and the Constants are -23 and 42
it's correct on edge!