Question

решите уровнение 5(х - 2) - (х- 1)=9​

Answer 1

Ответ:

$5x - 10 - x + 1 = 9 \\ 4x - 9 = 9 \\ 4x = 9 + 9 \\ 4x = 18 \\ x = 18 \div 4 \\ x = 4 \frac{2}{4} = 4.5$

Answer 2

5х-10-х+1=9

4х-9=9

4х=9+9

4х=18

х=9/2=4,5