Question

Тендеуді шешініз;4l2x+1l-7=5

Answer 1

Ответ:

$4 |2x + 1| - 7 = 5 \\ 4 |2x + 1| = 5 + 7 \\ 4 |2x + 1| = 12 \\ 4 |2x + 1| \div 4 = 12 \div 4 \\ |2x + 1| = 3$

$2x + 1 = 3 \\ 2x = 3 - 1 \\ 2x = 2 \\ x = 2 \div 2 \\ x = 1$

$2x + 1 = - 3 \\ 2x = - 3 - 1 \\ 2x = - 4 \\ x = - 4 \div 2 \\ x = - 2$

$x1 = - 2 \\ x2 = 1$