dajiadiehl2 dajiadiehl2
  • 28-02-2018
  • Mathematics
contestada

3x+y=7
6x+4y=22
can somebody help me solve this problem?

Respuesta :

Astute
Astute Astute
  • 28-02-2018
Hey there!

[tex]\boxed{x=1;y=4}[/tex]

[tex]3x + y = 7 \\ \\ 6x + 4y = 22[/tex]

[tex]y = -3x + 7 \\ \\ Plug \ this \ in \ for \ variable \ (y) \ in \ equation \ \\ \\ 6x + 4*(-3x+7) = 22 \\ \\ -6x = -6 \\ \\ 6x=6 \ x+1 \\ \\ x=1 \ y=-3x+7 \\ \\ \boxed{y=-3(1)+7=4} \\ \\ \boxed{\boxed{x=1;y=4}}[/tex]

I hope this helps you!
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