ab + ac = 108
ab - ac = 27
____________ → scad relatiile
( ab - a b ) + ac - ( - ac ) = 108 - 27
2 ac = 81
_________________________
ab + ac = 108
ab - ac = 27
____________ → adun relatiile
2 ab = 135
___________________
2 ab / 2 ac = 135 / 81
b / c = ( 135 : 27 ) / ( 81 : 27 ) = 5 / 3
Raspuns: b / c = 5 / 3
