Question

Решите систему. 20 баллов

Answer 1

Ответ:

y = 0,04; x = 0,06.

Пошаговое объяснение:

$\left \{ {{174x+142y=16,12} \atop {149x+117y=13,62}} \right.-\\\left \{ {{25x+25y=2,5} \atop {x+y=0,1}} \right.\\\left \{ {{149(0,1-y)+117y=13,62} \atop {x=0,1-y}} \right.\\\left \{ {{14,9-149y+117y=13,62} \atop {x=0,1-y}} \right.\\\left \{ {{-32y=13,62-14,9} \atop {x=0,1-y}} \right.\\\left \{ {{-32y=-1,28} \atop {x=0,1-y}} \right.\\\left \{ {{y=\frac{1,28}{32}=0,04} \atop {x=0,1-y}} \right.\\\left \{ {{y=0,04} \atop {x=0,1-0,04=0,06}} \right.$