Question

calcule o valor da expressao A-B-C,quando,A=-x-2y+10e B=x+y+1e C=-3x-2y+1

Answer 1

Olá,

A-B-C quando:

A = -x-2y+10
B = x+y+1
C = -3x-2y+1

(-x-2y+10)-(x+y+1)-(-3x-2y+1) =
-x-2y+10-x-y-1+3x+2y-1 =
-x-x+3x-2y-y+2y+10-1-1 =
-2x+3x-3y+2y+10-2 =
x-y+8

Resposta:

x-y+8