Ken, Justin, and Tiff have read a total of 100 books from the library. Justin read 3 4. times as many books as Ken and Tiff read 2 times as many as Justin. How many books did Ken read?

Find the equation of the line that is perpendicular to \( y=-4 x+3 \) and contains the point \( (8,1) \). \[ y=\frac{[?]}{[]} x+[] \]

d) \( (2 x-1)^{3} \cdot(1+2 x)^{3} \)

\( 6 a b ^ { 5 } + 9 a b ^ { 5 } c + c = \)

4. Vereinfache und berechne. a) \( \left(2^{2}\right)^{4} \) b) \( \left(x^{3}\right)^{5} \) c) \( \frac{\left(18 a^{2} b^{-6}\right)^{-2}}{\left(27 a^{3} b^{-3}\right)^{-4}} \)

Ecuación 2. \( \quad 2 \mathrm{X}+6 \mathrm{Y}=34 \) \( \Rightarrow \) Este método resuelve el sistema multiplicando las ecuaciones de tal forma que una incógnita se elimine quedando el sistema solo con una variable.