24. Five mark exercise problems II

1. Solve by the method of elimination: $3(2x + y) = 7xy$; $3(x + 3y) = 11xy$.

 

Answer:

 

$(x,y) =$ $\left(i,\frac{i}{i}\right)$

 

2. The monthly income of $A$ and $B$ are in the ratio $3:4$ and their monthly expenditures are in the ratio $5:7$. If each saves $₹5000$ per month, find the monthly income of each.

 

Answer:

 

Monthly income of $A$ is $₹$.

 

Monthly income of $A$ is $₹$.