Question

Опредилите значение х,при котором значение выражения -5х равно:
1)0
2)10
3)-15
4)- 5/9
5)9/5
6) 3 1/3

Answer 1

$- 5x = 0 \: \: | \div ( - 5) \\ x = 0$

$- 5x = 10 \\ x = 10 \div ( - 5) \\ x = - 2$

$- 5x = - 15 \\ x = - 15 \div ( - 5) \\ x = 3$

$- 5x = - \frac{5}{9} \\ x = - \frac{5}{9} \div ( - 5) \\ x = \frac{5}{9 \times 5} \\ x = \frac{1}{9}$

$- 5x = \frac{9}{5} \\ x = \frac{9}{5} \div ( - 5) \\ x = - \frac{9}{5 \times 5} \\ x = - \frac{9}{25} \\ x = - 0.36$

$- 5x = 3 \frac{1}{3} \\ x = 3 \frac{1}{3} \div ( - 5) \\ x = \frac{10}{3} \div ( - 5) \\ x = - \frac{10}{3 \times 5} \\ x = - \frac{2}{3}$