Question

Resolva o sistema abaixo
3×+4y=19
2×-3y=7

Answer 1

$\left \{ {{3x+4y=19 (x3)} \atop {2x-3y=7(x4)}} \right. \\ \left \{ {{9x+12y=57} \atop {8x-12y=28}} \right. \\ \left \{ {{17x=85} \atop {x=5}} \right. \\ \left \{ {{2(5) - 3y=7 \\ \left \{ {{10-3y=7} \\ \left \{ {{-3y=-3} \left \{ {y=1}$