Question

решите уравнения во влажениях. заранее спасибо.

Answer 1

 $A) (x-3frac{13}{21})+2frac{10}{21}=7frac{2}{21}\\x-3frac{13}{21}+2frac{10}{21}=7frac{2}{21}\\x-6frac{2}{21}=7frac{2}{21}\\x=7frac{2}{21}-6frac{2}{21}\\x=13frac{4}{21}$

 

 $B)(12frac{5}{13}+y)-9frac{9}{13}=7frac{7}{13}\\12frac{5}{13}+y-9frac{9}{13}=7frac{7}{13}\\2frac{9}{13}+y=7frac{7}{13}\\y=7frac{7}{13}-2frac{9}{13}\\y=4frac{11}{13}$