zlah zlah
  • 23-04-2017
  • Mathematics
contestada

y=x+2
x+y=20
simultaneous equations

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amber45856 amber45856
  • 23-04-2017
x=9, y=11; x + (x + 2) = 20; 2x + 2 = 20; 2x = 18; x = 9 
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