Solve : x + y = 6 and x - y = 2
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X+Y=6.... equation 1
X-Y=2........ equation 2
Solving by elimination
Adding equation 1 a2
X+Y=6
X-Y=2
2X =8
X=4
Finding Y by subtracting in equation 1
X+Y=6 Y=6-X
Y=6-4
Y=2
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