Respuesta :
Answer:
33
Step-by-step explanation:
a+b+c = -3
x+y = -9
Multiply the first equation by -2
-2(a+b+c )= -3*-2
-2a+-2b+-2c = 6
Multiply the second equation by -3
-3 (x+y) = -9*-3
-3x -3y = 27
Add the two equations together
-2a+-2b+-2c = 6
-3x -3y = 27
---------------------
-2a -2b-2c-3x-3y = 6+27
Rearranging the order
-2c-2a-3y-2b-3x = 33
Answer:
33
Step-by-step explanation:
[tex]a+b+c=-3,\ x+y=-9\qquad(*)\\\\-2c-2a-3y-2b-3x=-2a-2b-2c-3x-3y\\\\=-2(a+b+c)-3(x+y)\\\\\text{from}\ (*)\ \text{we have}\\\\=-2(-3)-3(-9)=6+27=33[/tex]