mads9915 mads9915
  • 25-10-2018
  • Mathematics
contestada

i have no idea how to do this

i have no idea how to do this class=

Respuesta :

simplygisel123
simplygisel123 simplygisel123
  • 25-10-2018

#1)  Set them up as y=mx+b

2x+y=4            -subtract 2x on both sides

NEW: y= -2x+4

3x+2y=1             -subtract 3x on both sides of equation

New: 2y= -3x+1             -Divide 2 on both sides (to get Y by itself)

NEW: y= -3/2x + 1/2

Set both Y equation equal to each other

-3/2x+1/2 = -2x+4

solve for x

you should then get x = 7  

plug in x=7 into one of the equations to get y

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