Question

7X - 3Y = 12 E 2X + 3Y = 10 SISTEMA DE EQUAÇÃO DE 1º GRAU

Answer 1

$\left \{ {{7x-3y=12} \atop {2x+3y=10}} \right. \\\\ 7x+2x=12+10\\9x=22\\\\\boxed{\boxed{x= \frac{22}{9}}}\\\\\\ 2x+3y=10\\\\2\cdot\frac{22}{9}+3y=10\\\\\frac{44}{9} +3y=10\\\\ 3y=10-\frac{44}{9}\\\\3y= \frac{(9\cdot10)-44}{9}\\\\3y= \frac{90-44}{9}\\\\3y=\frac{46}{9}\\\\9\cdot(3y)=46\\\\27y=46\\\\\\\boxed{\boxed{y=\frac{46}{27} }}$