Răspuns:
a=3, b = 7, c= 5
a×b -c= 3×7-5= 21-5= 16
a×c-b = 3×5-7= 15-7= 8
( a×b ) -( a+c) = ( 3×7) - ( 3+5) = 21-8= 13
( a×b) +( a× c) = ( 3×7) + ( 3×5) = 21 + 15= 36
a= 9, b= 6, c= 7
9×6 -7= 54-7= 47
9×7 - 6= 63 -6= 57
(9×6) - (9+7)= 54 -16= 38
( 9×6) + ( 9 ×7) = 54 +63= 117
