This dont go bi the rules
normally, yu kombine terms tu eleminate 1 letter, repeet til get
equashun with just 1 dont-no, so solv for that dontno
a+b=30, b+c=50, c-a=20....depend on eech other=yu kant eliminate NE 1
yu hafta ges a=10, plug it in & yu get ansers for b=20 & c=30
but if yu tri a=5, yu get b=25 & c=25
yu get reesuabel ansers tu all 3 , no matter wot yu ges for a