Question

РЕШИТЕ ПЖ СРОЧНООО!!!! 50БББ​

Answer 1

Ответ:

A 1) 24/56 = 3/7

A 2) 8/3

A 3 ) 16/5 ×15/32= 3/2 = 1 1/2

Пошаговое объяснение:

Answer 2

Ответ:

A1. 24/56 = 3/7.

A2. $2\frac{2}{3} = \frac{8}{3} = \frac{1}{\frac{3}{8}}$  Ответ 3/8

А3. $3\frac{1}{5}:2\frac{2}{15} = \frac{16}{5}:\frac{32}{15} = \frac{16*15}{5*32} = \frac{3}{2}$ $= 1\frac{1}{2}$

A4. 0,4x = 2,4. x = 2,4/0,4 = 24/4 =  6.

A5. 30%x = 105. 30x/100 = 105.

x = 105*100/30 = 105*10/3 = 35*10 = 350.

B1. $x-\frac{7x}{9} = 3,6;\\\frac{2x}{9} = 3,6;\\x = \frac{3,6*9}{2} = 1,8*9 = 16,2$

B2. $\frac{2x}{7} = 24;\\x = \frac{24*7}{2} = 12*7 = 84;$

C1. $\frac{60}{100}x + (x-\frac{60}{100}x)*\frac{7}{9}+8 = x;\\\frac{3}{5}x + \frac{2}{5}*\frac{7}{9}x + 8 = x;\\\\x * (1-\frac{3}{5}-\frac{2*7}{5*9}) = 8;\\x * (\frac{45-27-14}{45}) = 8;\\\frac{4}{45}x = 8;\\x = \frac{45*8}{4} = 45*2 = 90$