Question

9(х-5)=3 и найдите значение 3х

Answer 1

Ответ:

$9(x-5)=3\\9x-45=3\\9x=3+45\\9x=48\\x=48:9\\x=5\frac{3}{9}$

Проверка:

$9(5\frac{5}{9}-5)=3\\\\9(\frac{48}{9}-5)=3\\\\\frac{432}{9}-45=3\\\\\frac{432}{9}- \frac{405}{9}=3\\\\\frac{27}{9}=3\\\\27:9=3\\\\3=3$

$x=5\frac{3}{9}\\\\3x=3*5\frac{3}{9}\\\\3x=3*\frac{48}{9} \\\\3x= \frac{144}{9}\\\\3x= 16$