Question

5x + 2y = 58
x- y = -1​

Answer 1

Respuesta:

  $x=8\\y=9$

Explicación paso a paso:

$5x + 2y = 58\\x- y = -1$

$5x + 2y = 58\\2(x- y) = 2(-1)\\\\5x+2y=58\\2x-2y=-2\\\\7x=56\\\\x=\frac{56}{7}\\\\x=8$                                          $5x+2y=58\\\\5(8)+2y=58\\\\40+2y=58\\\\2y=58-40\\\\y=\frac{18}{2}\\\\y=9$