Solve x and y : x + y = 15 and x – y = 5
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x+y=15……..(i)x-y=5………(ii),From equation (ii), we getx=5+y Put the value of x in equation (i),we get5+y+y=152y=15-5y=10/2=5Now, put the value of y in equation (ii), we getx-5=5x=5+5=10:.x=10 and y=5
Adding by eliminTion method=2x=20X=10Putting in 1 eq x+y=15Y=15-10 = 5