Hello, modiej!
Where exactly is your difficulty?
\(\displaystyle \;\;\)You know nothing about simultaneous equations?
\(\displaystyle \;\;\)You don't understand the Elimination/Addition method?
\(\displaystyle \;\;\)You don't understand the Substitution method?
\(\displaystyle \;\;\)You don't know what method to use?
\(\displaystyle \;\;\)Fractions can stop you cold?
\(\displaystyle \;\;\)You really suck at Algebra?
No matter what method I use now, you'll prefer the other method anyway.
How about meeting us halfway with this?
What have you tried?
