Jika A=5,B=-6,C=3, maka nilai (9a+3b+5c)-(-a+7b-5c) adalah

(9.5+3.(-6)+5.3) - (-5+7.(-6)-5.3)
(45-18+15) - (-5-42-15)
42-(-62)
42+62
104

(9a+3b+5c)-(-a+7b-5c) =
((9×5)+(3×-6)+(5×3)) - ((-5)+(7×-6)-(5×3)) =
(45-18+15) - (-5-42-15)=
(42)-(-62 )=
42+62 = 104