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Anu bought $4$ notebooks and paid $₹200$ to the shopkeeper. If she gets $₹32$ as balance, find the cost of one notebook.

Ajay and Amar had the same amount of money. Ajay bought $4$ gift packets and was left with $₹325$. Amar bought $3$ gifts packets of the same type and was left with $₹425$. Find the cost of one gift packet.

The three sides of a triangle are given by the expressions $2x+3, x+8 \& x+2$. If the perimeter of the triangle is $33 cm$, find what type of triangle it is.

The sum of a number and $\frac{1}{3}$ of the number is $40$. Find the number.

The two sides of a square are given by the expressions $3x+1 \& 4x-2$. Find the perimeter of the square.

Simplify the following and solve.

$3\left(x-1\right)+4\left(2x+1\right)=23$

Simplify the following and solve.

$\frac{x-1}{4}+\frac{x+1}{3}=10$

The sum of the present age of a father and a son is $54 years$. Six years ago, the father's age was $2$ years more than $4$ times the age of the son at that time. Find their present ages.