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04-12-2019
Mathematics

contestada

x-3y=-24
5x+8y=-5

this equation is substitution, need help :))

Respuesta :

Yang100 Yang100

05-12-2019

Answer:

x=-9, y=5. (-9, 5).

Step-by-step explanation:

x-3y=-24

5x+8y=-5

--------------

x=-24+3y

5(-24+3y)+8y=-5

-120+15y+8y=-5

-120+23y=-5

23y=-5-(-120)

23y=-5+120

23y=115

y=115/23

y=5

x-3(5)=-24

x-15=-24

x=-24+15

x=-9

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