aysegul329 aysegul329
  • 05-02-2015
  • Mathematics
Answered

X+y=-4 -x+2y=13 can someone please help me with this I dont understand this



Answer :

eu99li
eu99li eu99li
  • 05-02-2015
{ x+y=-4
{-x+2y=13        (+)
x+(-x)+y+2y=-4+13
3y=9    /:3
y=3

x+y=4

x+3=4  /-3
x=1

Answer: y=3, x=1
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