A) 5(x-y) = 5(3) =15 B) 2x-2y =2(x-y) =2(3) =6 C)y-x =3 Explaining At the top of the question it is written that x-y =3 so in A we place x-y by 3 ad solve the multiplication in B we take 2 common and then place the value of x-y with 3 In C we just put the 3 HOPE THAT HELPS
