$x + 25\%x = 40$
$40×5 + 5.5x = 640$
$2.7 : x = 5 : 1.25$
$8x + 2.4 = 3.6$
$\frac{3}{8}x÷12 = 50\%$
$x : 42 = \frac{3}{7} : 10$
$40x + 5×1.2 = 25$
$\frac{1.2}{75} = \frac{0.4}{x}$
$8x - 0.36×2 = 0.08$
$8x÷\frac{1}{2} = \frac{3}{5}$
$75\%x - \frac{1}{4}x = 9$
$\frac{5}{9} + \frac{1}{4}x = \frac{2}{3}$
$4 : x = \frac{2}{3} : 6$
$6 = (10 + x) : 2$
$(4.5 + x) : 8 = \frac{3}{2}$

$x = 32$ $x = 80$ $x = 0.675$
$x = 0.15$ $x = 16$ $x = 1.8$
$x = \frac{19}{40}$ $x = 25$ $x = 0.1$
$x = \frac{3}{80}$ $x = 18$ $x = \frac{4}{9}$
$x = 36$ $x = 2$ $x = 7.5$

$4.7×3.99 + 16.01×4.7$
$2 - \frac{5}{6} + \frac{1}{3} - \frac{1}{9}$
$47.5 - (6.4÷0.32 - 7.5)$
$\frac{2}{3} + \frac{12}{13}×(\frac{5}{2} - \frac{1}{3})$
$15×(\frac{1}{15} + \frac{2}{19})×19$
$(8.8 - 4)×(0.48÷1.6)$
$(\frac{1}{2} + \frac{1}{3} - \frac{1}{4})×24$
$57×8 - 406$
$(2.3 + 2.3 + 2.3 + 2.3)×2.5$
$\frac{5}{12}÷13 + \frac{1}{13}×\frac{7}{12}$
$\frac{7}{25}÷[(\frac{2}{5} + \frac{1}{10})×\frac{8}{3}]$
$\frac{5}{8}×\frac{11}{10} + \frac{3}{8}÷\frac{10}{11}$
$5×0.75÷1.5×0.75$
$0.32×2.5×1.25$
$3.5×5.85 - 3.5 + 5.15×3.5$

$94$ $\frac{25}{18}$ $35$
$\frac{8}{3}$ $49$ $1.44$
$14$ $50$ $23$
$\frac{1}{13}$ $\frac{21}{100}$ $\frac{11}{10}$
$\frac{15}{8}$ $1$ $35$