Question

решите систему уравнений 3х+2у=8
                                          2х+6у =10

Answer 1

$left { {{3x+2y=8} atop {2x+6y =10}} right.$
$left { {{3x+2y=8} atop {2(x+3y) =10}} right.$
$left { {{3x+2y=8} atop {x+3y =5}} right.$
$left { {{3x+2y=8} atop {x =5 - 3y}} right.$
$left { {{3(5 - 3y) + 2y=8} atop {x =5 - 3y}} right.$
$left { {{15 - 9y + 2y=8} atop {x =5 - 3y}} right.$
$left { {{15 - 7y =8} atop {x =5 - 3y}} right.$
$left { {{7y =7} atop {x =5 - 3y}} right.$
$left { {{y =1} atop {x =2}} right.$