Question

4x+3y=22 -x+7y=10 номер 437

Answer 1

Ответ:

x=4, y=2.

Объяснение:

$\left \{ {{4x+3y=22} \atop {-x+7y=10}} \right. \\\left \{ {{x=7y-10} \atop {4(7y-10)+3y=22}} \\\right. \\\\28y-40+3y=22\\31y=62\\y=2\\x=7y-10=7*2-10=4$