Question

решите уравнения:а)х+9 7/10=28 2/15
б)11 3/4-у=5 15/34
в)7 27/44+а=18 51/55

Answer 1

$x+9 frac{7}{10} =28 frac{2}{15}; \ x=28 frac{2}{15}-9 frac{7}{10}; \ x=28 frac{2*2}{15*2}-9 frac{7*3}{10*3}; \ x=28 frac{4}{30}-9 frac{21}{30}; \ x=27frac{34}{30}-9 frac{21}{30}; \ x=18 frac{13}{30} \ \ 11 frac{3}{4} -y=5 frac{15}{34}; \ y= 11 frac{3}{4}-5frac{15}{34}; \ y= 11 frac{3*17}{4*17}-5frac{15*2}{34*2}; \ y= 11 frac{51}{68}-5frac{30}{68}; \ y= 6 frac{21}{68};$


$\ 7 frac{27}{44} +a=18 frac{51}{55} ; \ a=18 frac{51}{55} -7 frac{27}{44}; \ a=18 frac{51*4}{55*4} -7 frac{27*5}{44*5}; \ a=18 frac{204}{55*4} -7 frac{135}{44*5}; \ a=11 frac{69}{220}$