Question

x+y=180 x-y=35
найдите x и y​

Answer 1

$\left \{ {{x + y =1 80,} \atop {x - y = 35;}} \right. <=> \left \{ {{{x + y =1 80,} \atop {x=35+y;}} \right. <=> \left \{ {{35+2y=180,} \atop {x=35+y;}} \right. <=> \left \{ {{y=72,5} \atop {x=35+y}} \right. <=> \left \{ {{y=72,5} \atop {x=107,5}} \right.$

Answer 2

Ответ :X= 145
y= 110