Question

Решитее...... Пж....

Answer 1

1) $frac{7-5r}{r}-frac{8-5s}{8}$

$frac{8(7-5r)-r(8-5s)}{8r}$

$frac{56-40r-8r+5rs}{8r}$

$frac{56-48r+5rs}{8r}$

2) $frac{9-5z}{5z}+frac{5+4t}{4t}$

$frac{4t(9-5z)+5z(5+4t)}{20tz}$

$frac{36t-20tz+25z+20tz}{20tz}$

$frac{36t+25z}{20tz}$

3)$frac{7}{a}+ frac{b}{5a}$

$frac{35}{5a}+frac{b}{5a}$

$frac{35+b}{5a}$

4)$frac{5y}{8x}-frac{7y}{24x}$

$frac{8y}{24x}$

$frac{y}{3x}$

Answer 2

1..S*(7-5r)-r*(8-5s)/rs
7s-5rs-8r+5rs/rs
7s-8r/rs
2..4t*(9-5z)+5z*(5+4t)/20tz
36t-20tz+25z+20tz/20tz
36t-25z/20tz