Question

Problema 1
3x - 4y = 6
5x + 9y = 10

Problema 2
2x - 2y = 2
6x - 5y = 1

Answer 1

1)  
   $\left \{ {{3x-4y=6} \atop {5x+9y=2}} \right. \left \{ {{-4y=-3x+6} \atop {9y=-5x+2}} \right. \left \{ {{4y=3x-6} \atop {9y=-5x+2}} \right. \left \{ {{y= \frac{x3x-6}{4} } \atop {y= \frac{-5x+2}{9} }} \right.$
2)
  $\left \{ {{2x-2y=2} \atop {6x-5y=1}} \right. \left \{ {{-2y=-2x+2} \atop {-5y=-6x+1}} \right. \left \{ {{2y=2x-2} \atop {5y=6x-1}} \right. \left \{ {{y= \frac{2x-2}{2} } \atop {y= \frac{6x-1}{5} }} \right.$