Andre111 Andre111
  • 25-09-2017
  • Mathematics
contestada

If x + y =28 and x - y = -4 , then find the numerical value of y

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Daphyy
Daphyy Daphyy
  • 25-09-2017
12+16=28
12-16= -14
Therefore y= 16
Answer Link
vinzkumar10owgvm7
vinzkumar10owgvm7 vinzkumar10owgvm7
  • 25-09-2017
solve simultaneously! use elimination method.

x+y=28
-
x-y=-4
=0x+2y=32
2y/2=32/2
y=16
Answer Link

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