Блок Б. Сократите дроби: 1) (3x−15y)/(4x−20y); 2) (4−2a)/(6a−12); 3) (a²+3a)/(15+5a); 4) (16x+8y)/(9y+18x); 5) (x²−4x)/(28−7x); 6) (18y²−9y)/(3y²−6y³); 7) (7x−14y)/(21(2y−x)); 8) 2(x−b)/(3(b−x)); 9) (3x+9)/(15(x+3)); 10) (5−x)/(x−5).

Question

Вопрос:

Accepted Answer

\(\frac{3(x-5y)}{4(x-5y)}=\frac34\)
\(\frac{2(2-a)}{6(a-2)}=-\frac13\)
\(\frac{a(a+3)}{5(a+3)}=\frac a5\)
\(\frac{8(2x+y)}{9(2x+y)}=\frac89\)
\(\frac{x(x-4)}{7(4-x)}=-\frac x7\)
\(\frac{9y(2y-1)}{3y^2(1-2y)}=-\frac3y\)
\(\frac{7(x-2y)}{21(2y-x)}=-\frac13\)
\(\frac{2(x-b)}{3(b-x)}=-\frac23\)
\(\frac{3(x+3)}{15(x+3)}=\frac15\)
\(\frac{5-x}{x-5}=-1\)

Ответ: