Question

Resolva:

$<var>\left \{ {{x+2y=6} \atop {2x-3y=12}} \right.</var>$

Answer 1

x+2y = 6 (.-2)

-2x -4y = 12
2x -3y = 12
-7y = 24
y = 24/7

x + 2(24/7) = 6
x + 28/7 = 6
x + 4 = 6
x = 6 -4
x = -2