Question

7. Розв'яжи рiвняння.
а)3/14х=1
б)5/12х=1/2
в)4/9х=2 2/3
г)1 7/10х=6 4/5
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Answer 1

$\frac{3}{14} x = 1 \\ x = 1 \div \frac{3}{14} \\ x = \frac{14}{3} \\ x = 4 \frac{2}{3}$

$\frac{5}{12} x = \frac{1}{2} \\ x = \frac{1}{2} \div \frac{5}{12} \\ x = \frac{12}{2 \times 5} \\ x = \frac{6}{5} \\ x = 1 \frac{1}{5} \\ x = 1.2$

$\frac{4}{9} x = 2 \frac{2}{3} \\ x = 2 \frac{2}{3} \div \frac{4}{9} \\ x = \frac{8 \times 9}{3 \times 4} \\ x = 6$

$1 \frac{7}{10} x = 6 \frac{4}{5} \\ x = 6 \frac{4}{5} \div 1 \frac{7}{10} \\ x = \frac{34 \times 10}{5 \times 17} \\ x = 4$