Question

прошу помогите мне ​

Answer 1

$frac{2}{5} - frac{3}{15} = frac{6}{15} - frac{3}{15} = frac{3}{15} = frac{1}{5}$

$frac{6}{8} + frac{3}{10} = frac{60}{80} + frac{24}{80} = frac{84}{80} = 1 frac{4}{80} =1 frac{1}{20}$

$frac{4}{6} times frac{10}{12} = frac{2}{3} times frac{5}{6} = frac{5}{9}$

$frac{10}{25} div frac{6}{50} = frac{10}{25} times frac{50}{6} = frac{10}{3} = 3 frac{1}{3}$

$6 {}^{3} = 216$

$sqrt{36} = 6$

$10(5x - 2) = 30 \ 5x - 2 = 3 \ 5x = 5 \ x = 1$

$2(4x + 3) = 6x + 32 \ 8x + 6 = 6x + 32 \ 2x = 26 \ x = 13$