Question

5. Розв'яжи рiвняння: a) -23:2,4=x: 3 6) 45-k=-2-6321; в)º 33:(514-x)=21:​

Answer 1

$- 23 \div 2.4 = x \\ x = - \frac{23 \times 5}{12} \\ = - \frac{115}{12} \\ x = - 9 \frac{7}{12}$

$45 - k = - 2 - 6321 \\ 45 - k = - 6323 \\ k = 45 + 6323 \\ k = 6368$

$33 \div (514 - x) = 21 \\ 514 - x = \frac{33}{21} \\ 514 - x = \frac{11}{7} \\ 514 - x = 1 \frac{4}{7} \\ x = 514 - 1 \frac{4}{7} \\ x = 513 \frac{7}{7} - 1 \frac{4}{7} \\ x = 512 \frac{3}{7}$