Решите уравнение 1/5x+3/10x-1/2=2

Решите уравнение
1/5x+3/10x-1/2=2
- Предмет:
  Математика
- Автор:
  angela
- 6 лет назад

Ответы 1

$\frac{1}{5}x+ \frac{3}{10}x- \frac{1}{2} =2 \\ \frac{1}{5}x+ \frac{3}{10}x=2+ \frac{1}{2} \\ \frac{2+3}{10}x=2 \frac{1}{2} \\ \frac{1}{2} x=2 \frac{1}{2} \\ x=2 \frac{1}{2} : \frac{1}{2} \\ x= \frac{5}{2} * \frac{2}{1} \\ x=5 \\ \\ \\ \frac{1}{5}x+ \frac{3}{10}x- \frac{1}{2} =2 \\ 0,2x+0,3x-0,5=2 \\ 0,5x-0,5=2 \\ 0,5x=2+0,5 \\ 0,5x=2,5 \\ x=2,5:0,5 \\ x=5$ =============== $\frac{1}{5}x+ \frac{3}{10}x- \frac{1}{2} =2/*10 \\ 2x+3x-5=20 \\ 5x-5=20 \\ 5x=20+5 \\ 5x=25 \\ x=25:5 \\ x=5$
- Автор:
  wesley84
- 6 лет назад
- 0
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Решите уравнение 1/5x+3/10x-1/2=2

Ответы 1

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Решите уравнение
1/5x+3/10x-1/2=2