11. If the price of oranges was raised by \( \frac{1}{2} \) per orange, the number of oranges a customer can buy for N 2.40 will be less by 16 . What is the present price of an orange?

Simplify the following. a \( \quad 4 n \times 6 n \)

\( \frac{x}{a-b+c}=\frac{y}{b-c+a}=\frac{z}{c-a+b} \) Demons trates That \( \frac{x+y}{a}=\frac{y+z}{b} \)

What is the solution of \( \frac{3 x-1}{7} \geq 2 \) ?

Варнант 3 1. Выполните действия \( \begin{array}{ll}\frac{2 x+8}{6 x-12}+\frac{6-2 x}{4 x-8} & \frac{2 x+8}{4 x-12}-\frac{2 x-2}{x-3} \\ \frac{52 x^{9}}{102 y^{7}} \cdot \frac{68 y^{5}}{78 x^{6}} & \frac{64 a^{7}}{45 y^{10}}: \frac{6 a^{5}}{135 y^{6}}\end{array} \)

(2) If \( \frac{2}{L}, \frac{2}{m} \) are the two roots of the equation \( 4 x^{2}+3 x-2=0 \), find the quadratic equation of roots \( L, m \).