Question

Розв'язати рівняння

а) -2,4 х =4,8;
б) -х = -3,5;
в) 0,14 х = -0,077;
г) -8,5 :х =-1,7;
ґ) х(-5/9) =20/63);
д) - (8/9):х = 4.

Answer 1

$- 2.4x = 4.8 \\ x = 4.8 \div ( - 2.4) \\ x = - 2$

$- x = - 3.5 \\ x = 3.5$

$0.14x = - 0.077 \\ x = - 0.077 \div 0.14 \\ x = - \frac{77 \times 100}{1000 \times 14} \\ x = - \frac{11}{20} \\ x = - 0.55$

$- 8.5 \div x = - 1.7 \\ x = - 8.5 \div ( - 1.7) \\ x = 5$

$x \times ( - \frac{5}{9} ) = \frac{20}{63} \\ x = \frac{20}{63} \div ( - \frac{5}{9} ) \\ x = - \frac{20 \times 9}{63 \times 5} \\ x = - \frac{4}{7}$

$- \frac{8}{9} \div x = 4 \\ x = - \frac{8}{9} \div 4 \\ x = - \frac{8}{9 \times 4} \\ x = - \frac{2}{9}$