Răspuns :
A+b=2,754
A×0,8=b
--> a+ a×0,8= 1,8×a = 2,754
--> a = (2,754)÷(1,8)= 1,53
--> b= a×0,8= 1,53 × 0,8 = 1,224
A×0,8=b
--> a+ a×0,8= 1,8×a = 2,754
--> a = (2,754)÷(1,8)= 1,53
--> b= a×0,8= 1,53 × 0,8 = 1,224