CHECK: Brüche und Variablen (Subtraktion)

1.) \( \frac{40}{2} - \frac{x}{2} = \frac{13}{2} \Rightarrow x = \)

2.) \( \frac{64}{8} - \frac{x}{4} = \frac{15}{2} \Rightarrow x = \)

3.) \( \frac{3}{4} - \frac{x}{20} = \frac{2}{5} \Rightarrow x = \)

4.) \( \frac{60}{2} - \frac{78}{x} = \frac{42}{4} \Rightarrow x = \)

5.) \( \frac{25}{3} - \frac{25}{x} = \frac{75}{12} \Rightarrow x = \)

6.) \( \frac{7}{3} - \frac{68}{x} = \frac{5}{7} \Rightarrow x = \)

7.) \( \frac{x}{150} - \frac{1}{30} = \frac{6}{300} \Rightarrow x = \)

8.) \( \frac{x}{50} - \frac{1}{5} = \frac{200}{500} \Rightarrow x = \)

9.) \( \frac{x}{150} - \frac{12}{200} = \frac{12}{50} \Rightarrow x = \)

10.) \( \frac{1}{4} - \frac{x}{4} = \frac{5}{20} \Rightarrow x = \)

11.) \( \frac{8}{25} - \frac{x}{50} = \frac{20}{125} \Rightarrow x = \)

12.) \( \frac{5}{4} - \frac{x}{3} = \frac{9}{36} \Rightarrow x = \)