Question

Ayuda porfa es urgente!!!!!!

Answer 1

Respuesta:

a)(x,y)=(22,14), b)$\left \{ {{x+y=36} \atop {x/y=8}} \right.$ c)$\left \{ {{2x+y=36} \atop {x-y=8}} \right.$ d)$\left \{ {{2x+2y=36} \atop {x-y=8}} \right.$

Explicación paso a paso:

a) x-y+y=8+y

1. x=8+y
2. 8+y+y=36
3. 8+y+y=36
4. 8+2y=36
5. 2y=36-8
6. 2y=28
7. y=14
8. x=8+14
9. x=22

b)$\left \{ {{x+y=36} \atop {x/y=8}} \right.$

1. x+y-y=36-y
2. x=36-y
3. 36-y/y=8
4. 36y-y=8y
5. -y-8y=-36
6. -9y=-36
7. y=4
8. x=36-4
9. x=32

c)$\left \{ {{2x+y=36} \atop {x-y=8}} \right.$

1. 2x+y-2x=36-2x
2. y=36-2x
3. x-(36-2x)=8
4. x-36+2x=8
5. 3x-36=8
6. 3X=8+36
7. 3X=44
8. $x=\frac{44}{3}$
9. y=36-2*$\frac{44}{3}$
10. y=36-88/3
11. y=$\frac{20}{3}$

d)$\left \{ {{2x+2y=36} \atop {x-y=8}} \right.$

1. x-y+y=8+y
2. x=8+y
3. 2(8+y)+2y=36
4. 16+2y+2y=36
5. 16+4y=36
6. 4y=36-16
7. 4y=20
8. y=5
9. x=8+5
10. x=13

Me esforcé mucho, espero que les funcione