Rozwiąż równanie : a+3b=27 a/b= 3/2

{a+3b=27 {a/b= ³/₂ to sie mnoży a z 2 b z 3 {a+3b=27 {2a=3b {a+3b=27 {2a-3b=0 `````````` __3a=27/:3 ___a=9 a+3b=27 9+3b=27 3b=27-9 3b=18/:3 b=6 {a=9 {b=6

a+3b=27 a/b= 3/2 a=27-3b (27-3b)2=3b a=27-3b 54-6b=3b a=27-3b -9b=-54 a=27-3b b=6 a=27-3*6 b=6 a=27-18 b=6 a=9 b=6