(a)[3]
Let Gita’s number of stamps be $n$. Ravi has twice Gita’s number of stamps. Sanjay has $7$ fewer stamps than Ravi. Altogether, the three of them have $108$ stamps. Set up an equation in $n$ and solve it to determine how many stamps Sanjay has.
(b)[2]
Simplify $\frac{6t^2v^3}{5} \div \frac{3t^2}{v^2}$.
(c)[3]
Simplify $\frac{x^2 - 16}{3x^2 + 10x - 8}$.