Respuestas

2013-11-01T17:15:18+01:00
  • Usuario de Brainly
2013-11-01T17:23:35+01:00
 \left \{ {{5x-8y=-13} \atop {2x-3y=-4} \right.

\left \{ {{5x=-13+8y} \atop {2x-3y=-4}} \right.

\left \{ {{x=(-13+8y)/5} \atop {2x-3y=-4}} \right.

\left \{ {{x=(-13+8y)/5} \atop {2((-13+8y)/5)-3y=-4}} \right.

\left \{ {{x=(-13+8y)/5} \atop {(-26+16y)/5)-3y=-4}} \right.

\left \{ {{x=(-13+8y)/5} \atop {-130+80y-15y=-20}} \right.

\left \{ {{x=(-13+8y)/5} \atop {180y-15y=-20+130}} \right.

\left \{ {{x=(-13+8y)/5} \atop {65y=110}} \right

\left \{ {{x=(-13+8y)/5} \atop {y=110/65}} \right

y = 110/65 -----> y = 22/13

5x-8y= -13 -----> 5x-(176/13)= -13 -----> 5x= -13+176/13 -----> 5x = (-169+176)/13      -----> 5x = -7/13 -----> x = -7/65

y = 22/13
x = -7/65

espero que te sirva
salu2!!