By the method of substitution,solve the following pair of linear equations: $3x - 7y = 18, 6x - 14y = 12$.

The father's age is six times his son's age. Four years hence,the age of the father will be four times his son's age. The present ages,in years,of the son and the father are,respectively

Solve the following pair of linear equations by the substitution method:
$\frac{3x}{2} - \frac{5y}{3} = -2$
$\frac{x}{3} + \frac{y}{2} = \frac{13}{6}$

If $2x + y = 35$ and $3x + 4y = 65$,then find $\frac{x}{y}$.

Solve the following pair of linear equations by the method of substitution: $x + y = 7$ and $5x + 12y = 7$.

Form the pair of linear equations for the following problems and find their solution by the substitution method.
The coach of a cricket team buys $7$ bats and $6$ balls for ₹ $3800$. Later,she buys $3$ bats and $5$ balls for ₹ $1750$. Find the cost of each bat and each ball.