heyitstala heyitstala

07-04-2021
Mathematics

contestada

Solve the system using substitution. Show all work.
( 4х + 5y = 7
у = 3х + 9

Respuesta :

calinuurbaadil calinuurbaadil

07-04-2021

Answer:

(4x+5y=7

y=3x+9

4x+5(3x+9)=7

4x+15x+45=7

19x=7-45

19x= -38

19×/19=-38/19

x= -2

whlie y=3x+9

y=3(-2)+9

y= -6+9

y=3 end solution

x= -2,y= 3

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