Question

помогитее срочнооо надоо быстрро!!!!

Answer 1

а)
$7.5 \div 4.5 = x \div 0.12 \\ 4.5x = 0.12 \times 7.5 \\ 4.5x = 0.9 \\ x = 0.2$

б)
$\frac{y - 5}{6} = \frac{4}{3} \\ \\ y - 5 = 8 \\ y = 13$

в)
$\frac{15}{2x - 3} = \frac{5}{6} \\ \\ \frac{15 \times 6(2x - 3)}{2x - 3} = \frac{5 \times 6(2x - 3)}{6} \\ \\ 90 = 10x - 15 \\ 10x = 105 \\ x = 10.5$

г)
$\frac{24}{x + 2} = \frac{1}{5} \\ \\ 120 = x + 2 \\ x = 118$

д)
$\frac{2}{5} = \frac{6}{x + 3} \\ \\ 2x + 6 = 30 \\ 2x = 24 \\ x = 12$

е)
$12 \div 0.8x = 20 \div 0.25 \\ 0.8x \times 20 = 0.25 \times 12 \\ 16x = 3 \\ x = \frac{3}{16}$