ecuaciones papuuuh

igualacion:

4x+y=17

-x+2y=-2

2y=-2+x/2

17-4x/2=-2+x/2

34-8x=-2+x

-9x=-36

x=-36/-9= 4

4.4+y=17

36+y=17

y=17-36=-19

sustitución.

x+3y=5

5x+2y=8

X=5-3y

5(5-3y) +2y =8

25-15y+2=8

-15y=8-2-25                      -19/-15=

reduccion:

6x+8y=-14

5x-4y=-1

6x+8y=-14

10x-8y=-2

16x=-16

x=1

6x1+8y=-14

6+8y=-14

6+14= 8y

20=8y          

20/8=5/2