Question

{(2x+2y=18 @x+2y=13)┤ b){(2.(x+y)=44@x/2+Y=16)┤

Answer 1

Resposta:

$2x+2y=18\\2.(x+y)=18\\x+y=18/2\\x+y=9\\y=9-x\\x+2.(9-x)=13\\x+18-2x=13\\-x=13-18\\x=5y=42.(x+y)=44x/2 + y =16\\x+y= 22x=22-y\\22-y/2 +y\\ 22+y/2 \\22+y/2=16\\22+y=32\\y=10\\x=12$