Question

$<var>\left \{ {{y=5+3x} \atop {2x-3y=-8}} \right.</var>$

Answer 1

2x - 3(5+3x) = - 8
2x - 15 - 9x = - 8
 -7x = - 8 + 15
 -7x = 7(-1)
  7x = - 7
 x = - 1

  y = 5 + 3x
  y = 5 + 3(-1)
  y = 5 - 3

   y = 2

Answer 2

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

$2x-3(5+3x)=-8\\2x-15-9x=-8\\-7x=-8+15~~\bullet~(-1)\\7x=-7\\x=-7/7\\\boxed{x=-1}$

$y=5+3x\\y=5+3(-1)\\y=5-3\\\boxed{y=2}$

$\lambda$