caralovesit caralovesit

22-11-2016
Mathematics

contestada

solve the system of linear equations

x + y = 4 and 2x + 3y = 0

Respuesta :

leeandrews2 leeandrews2

22-11-2016

solve this answer by using substitution. set the first equation to x=-y+4 then substitute -y+4 for x in the second equation.

2(-y+4) + 3y=0

-2y+8 + 3y=0

y+8=0

y=-8

now use -8 and solve for x

x+(-8)=4

x=12

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