b) 2x-3y=9............. (1)
2x+y=13............ (II)
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given that,
2x-3y=9............(1)
2x+y =13...........(2)
now, (2)=> y = 13 -2x..........(3)
so putting (3) in (1) we get
2x - 3( 13 - 2x ) = 9
2x - 39+ 6x = 9
8x =39+9
8x = 48
x = 48/8
x =6 ............(4)
putting (4) in (3) we get,
=> y = 13- 2.6
y = 13- 12
y = 1
so, x= 6 and y=1
hope it's helpful for you
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