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Answer Posted / m n r
1.2x+y=10
2.x=3
3.so, 2*3+y=10
4.multyply with 2*3 is 6
5.i.e 6+y=10
6.take y first
7.so,y=10-6
8.y=4
9.x-y
10.3-4=-1
11.Ans : -1
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