Question

Me ajudem pelo amor de Deus ;(

Answer 1

$o~~sucessor~~de~~um~~nu\´mero~~~e\´~~sempre:(x+1),o~~dobro=(2x+2)$.

$\left \{ {{2x+3y=19} \atop {3x +2y+2=18}} \right. = \left \{ {{2x+3y=19} \atop {3x+2y=16}} \right.$

$2x=19-3y$
$x = \frac{19-3y}{2}$
$3( \frac{19-3y}{2}) +2y=16$              $mmc = 2$

$3(19-3y)+4y=32$
$57-9y+4y=32$
$-5y=32-57$
 $-5y=-25$
$y= \frac{-25}{-5} = 5$
$\boxed { y=5}$

$3x+2.5=16$
$3x=16-10$
$x= \frac{6}{3} = 2$
$\boxed {x=2}$

Diferença entre x e y :
$2 - 5 = -3$