39.2. Выполните сложение дробей: x y 1)+; 562 1362 + 4) За за; a b 2)+ ; 4 4 x+y 2x 5) + ; 19 19 a 2a 3)+; y y 2c-x x 6) +. 2b 2b

1) \[\frac{x}{5} + \frac{y}{5} = \frac{x+y}{5}\]

2) \[\frac{a}{4} + \frac{b}{4} = \frac{a+b}{4}\]

3) \[\frac{a}{y} + \frac{2a}{y} = \frac{a+2a}{y} = \frac{3a}{y}\]

4) \[\frac{5b^2}{3a} + \frac{13b^2}{3a} = \frac{5b^2+13b^2}{3a} = \frac{18b^2}{3a} = \frac{6b^2}{a}\]

5) \[\frac{x+y}{19} + \frac{2x}{19} = \frac{x+y+2x}{19} = \frac{3x+y}{19}\]

6) \[\frac{2c-x}{2b} + \frac{x}{2b} = \frac{2c-x+x}{2b} = \frac{2c}{2b} = \frac{c}{b}\]