Question

| (18-3х)•4+40|:25=4

Answer 1

$\frac{ |(18 - 3x) \times 4 + 40| }{25} = 4 \: \: | \times 25 \\ |(18 - 3x) \times 4 + 40| = 100 \\ |72 - 12x + 40| = 100 \\ |112 - 12x| = 100 \\ \\ 112 - 12x = 100 \\ 12x = 112 - 100 \\ 12x = 12 \\ x = 12 \div 12 \\ x _{1} = 1 \\ \\ 112 - 12x = - 100 \\ 12x = 112 - ( - 100) \\ 12x = 112 + 100 \\ 12x = 212 \\ x = \frac{212}{12} \\ x = \frac{ 53 }{3} \\ x _{2} = 17 \frac{2}{3}$

Ответ : х = 1 ; 17 2/3