Question

1) (4,5/9-3,7/12)÷(-1,8/27)
2) 2(1,1/7-х)-3,1/14= -2,5/7

Answer 1

1) -0,473; 2)X=-0,021

Answer 2

$1)(4.5 \div 9 - 3.7 + 12) \div ( - 1.8 \div 27) = (0.5 - \frac{37}{10} \times \frac{1}{12} ) \div ( - \frac{9}{5} \times \frac{1}{27} ) = ( \frac{1}{2} - \frac{37}{120} ) \div ( - \frac{1}{5} \times \frac{1}{3} ) = \frac{23}{120} \div ( - \frac{1}{15} ) = - \frac{23}{120} \times 15 = - \frac{23}{8} = - 2 \frac{7}{8} = - 2.875$
$2)2(1.1 \div 7 - x) - 3.1 \div 14 = - 2.5 \div 7$
$2.34 - 2x - \frac{31}{10} \times \frac{1}{14} = - \frac{5}{2} \times \frac{1}{7}$
$\frac{117}{50} - 2x - \frac{31}{140} = - \frac{5}{14}$
$\frac{1483}{700} - 2x = - \frac{5}{14}$
$- 2x = - \frac{5}{14} - \frac{1483}{700}$
$x = \frac{1733}{1400}$
$x = 1 \frac{333}{1400}$