Pleses do this sum
Q.9. 3 x + 8 y = 11 20 2 x + 9 y = 11 10

Dear Student ,
 
Please find below the solution to the asked query :

3x+8y=1120   ... 12x+9y=1110   ... 2From eqn 1, we get3x=1120-8y3x=11-160y20x=11-160y60Substituting the value of x in 2 , we get211-160y60+9y=111011-160y30+9y=111011-160y+270y30=111011+110y3=1111+110y=33110y=22y=22110y=15x=11-1601560=11-3260x=-2160
 
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