$\frac{2}{3}x + 50\%x = 126$ $45x - 60 = 120$ $4x \times 75\% = 18$
$\frac{1.2}{x} = \frac{4}{5}$ $x - \frac{3}{4}x = 160$ $(4.6 + 15.4)x = 7.5$
$5x - 5 \times \frac{1}{2} = \frac{4}{5}$ $1.6 : \frac{1}{8} = x : 0.5$ $x : \frac{5}{8} = \frac{9}{10} : \frac{3}{8}$
$\frac{x}{120} = 4.2 : 1.6$ $\frac{1}{6} : \frac{2}{5} = \frac{1}{2} : x$ $16 : 10 = x : 8$

$x = 108$ $x = 4$ $x = 6$
$x = 1.5$ $x = 640$ $x = 0.375$
$x = \frac{33}{50}$ $x = 6.4$ $x = \frac{3}{2}$
$x = 315$ $x = \frac{6}{5}$ $x = 12.8$

$(360 \div 15 + 2.5) \times 14$ $208 \times (63 - 2050 \div 50)$ $34.82 - 4.4 - (4.82 + 5.6)$
$283 + 360 \times 1.2 + 1017$ $2.9 \times 3.66 + 2.9 \times 6.34$ $(85\% + 75\%) \times 5 \div \frac{8}{3}$
$3.25 \div (3.3 - 2.8) \div 1.3$ $\frac{5}{9} + \frac{9}{25} + \frac{4}{9} + \frac{16}{25}$ $\frac{2}{3} \times [(\frac{1}{4} - \frac{1}{8}) \div \frac{3}{4}]$
$\frac{1}{3} \times (\frac{3}{5} + 18 \times \frac{1}{3})$ $\frac{5}{7} - \frac{3}{5} \times \frac{3}{14} \div 30\%$ $2 \div (\frac{5}{6} + \frac{1}{3} \times 75\%)$
$81 \times (1 - \frac{1}{9}) \div \frac{8}{7}$ $\frac{9}{40} \div [\frac{1}{4} \times (\frac{1}{5} + \frac{6}{5})]$ $121 \div [(40\% + \frac{1}{3}) \times \frac{3}{4}]$
$(\frac{7}{11} - \frac{1}{8}) \times 88$ $\frac{11}{25} \times \frac{9}{13} + \frac{4}{25} \times \frac{11}{13}$ $(3.75 + 4.1 + 2.35) \times 9$

371 4576 20
1732 29 3
5 2 $\frac{1}{9}$
$2\frac{1}{5}$ $\frac{2}{7}$ $\frac{24}{13}$
63 $\frac{9}{14}$ 220
45 $\frac{11}{25}$ 91.8