Question

6. Решите уравнение:
 |2х – 5|  + 3,5 = 6,5
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Answer 1

$|2x - 5| + 3.5 = 6.5 \\ |2x - 5| = 6.5 - 3.5 \\ |2x - 5| = 3$

$2x - 5 = 3 \\ 2x = 3 + 5 \\ 2x = 8 \\ x = 8 \div 2 \\ x = 4$

$2x - 5 = - 3 \\ 2x = - 3 + 5 \\ 2x = 2 \\ x = 2 \div 2 \\ x = 1$

первый x=1

второй x=4