Question

x=4y+20
x=-8y-43




x= -y=3
x=y-100

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Answer 1

Respuesta:

Explicación paso a paso:

x = 4y + 20........(1)
x = - 8y - 43......(2)

Igualamos (1) = (2):


4y + 20 = - 8y - 43

4y + 8y = - 43 - 20

12y = - 63

y = - 63/12

y = - 21/4

Sustituyendo y en (1):

x = 4y + 20

x = 4(- 21/4) + 20

x = - 84/4 + 20

x = - 21 + 20

x = - 1