crisfusecrawalla crisfusecrawalla
  • 02-03-2017
  • Mathematics
contestada

X - Y = 11
2x + Y = 19

where do the lines cross

Respuesta :

wolf1728
wolf1728 wolf1728
  • 02-03-2017
Just solve the equations:
A) X - Y = 11
B) 2x + Y = 19
Multiply A) by -2

A) -2X  +2Y = -22 then add to B)
B) 2x + Y = 19
3Y = -3
Y=-1

A) X - -1 = 11
x = 10


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