Question

Alguém me manda a resposta com a conta junto?pfvrrr

Answer 1

Resposta:

61)  a) 3x-5y+7+2x-3y-6+(-x-y-1)=

         3x-5y+7+2x-3y-6-x-y-1=

         3x+2x-x-5y-3y-y=

        4x- 9y

b) 3x-5y+7+2x-3y-6-(-x-y-1) =

   3x-5y+7+2x-3y-6+x+y+1 =

   6x-8y+2

c) -x-y-1-(2x-3y-6)+3x-5y+7 =

   -x-y-1-2x+3y+6+3x-5y+7 =

   -3y+12

d) -x-y-1-(3x-5y+7) - (2x-3y-6) =

   -x-y-1-3x+5y-7-2x+3y+6 =

  -6x+7y-2