Question

пожалуйста срочно 798, 799​

Answer 1

798 номер:

$\left \{ {{x + y = 348} \atop {y = 0,8x + 6}} \right.$

$\left \{ {{x + 0,8x + 6 = 348} \atop {y = 0,8x + 6}} \right.$

$\left \{ {{1,8x = 342} \atop {y = 0,8x + 6}} \right.$

$\left \{ {{x = 190} \atop {y = 152 + 6}} \right.$

799 номер:

$\left \{ {{x + y = 11} \atop {1,5x=1,8y}} \right.$

$\left \{ {{1,2y + y = 11} \atop {1,5x=1,8y}} \right.$

$\left \{ {{2,2y = 11} \atop {1,5x=1,8y}} \right.$

$\left \{ {{y=5} \atop {1,5x=9}} \right.$

$\left \{ {{y=5} \atop {x=6}} \right.$