Question

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Answer 1

Respuesta:

a) x=3, y=2

b) x=2, y=5

c) x=2, y=3

Explicación paso a paso:

a)

$x+y=5=x=5-y\\2x-y=4=2x=4+y\\x=(\frac{5-y}{1})=x=(\frac{4+y}{2}) \\2(5-y)=1(4+y)\\10-2y=4+y\\-2y-y=4-10\\-3y=-6\\y=\frac{6}{3}=2\\x+1(2)=5\\x+2=5\\x=5-2\\x=3$

b)

$2x+y=9=2x=9-y\\3x-y=1=3x=1+y\\x=(\frac{9-y}{2})=x=(\frac{1+y}{3})\\3(9-y)=2(1+y)\\27-3y=2+2y\\-3y-2y=2-27\\-5y=-25\\y=\frac{25}{5}=5\\\\2x+1(5)=9\\2x+5=9\\2x=9-5\\2x=4\\x=\frac{4}{2}=2$

c)

$4x-y=5=4x=5+y\\2x+y=7=2x=7-y\\x=(\frac{5+y}{4})=x=(\frac{7-y}{2})\\2(5+y)=4(7-y)\\10+2y=28-4y\\2y+4y=28-10\\6y=18\\y=\frac{18}{6}=3\\\\4x-1(3)=5\\4x-3=5\\4x=5+3\\4x=8\\x=\frac{8}{4}=2$

Discúlpame la D no lo pude resolver

Espero te ayude mucho

Answer 2

Respuesta:

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