Question

Intr-o zi de lucru,Sofia si Abdul castiga impreuna 230$.Daca Sofia castiga cu 20$ mai mult decat patru treimi din cat castiga Abdul,descopera cati $ castiga fiecare copil

Answer 1

Sofia=S
Abdul=A
S=20+3/4A
A+20+3/4A=230
7/4A+20=230
7A/4=210
7A=210×4
7A=840
A=120$
S=230-120
S=110$
/=linia de fractie

Answer 2

S+A = 230 => S = 230-A

S = 20 + (4/3 )x A <=> 3S = 60 +4A

3 x 230 - 3 A = 60 + 4 A <=> 690-60 = 7 A <=> 610 = 7A => A = 610/7 $ ≈87,14$

S = 230-610/7 = 1000/7 $ ≈142,86$