Question

Помогите пж! У нас сор!!

Answer 1

а)

$2.4(x - 3) = 1.5(x -7 ) \\ 2.4x - 7.2 = 1.5x - 10.5 \\ 2.4x - 1.5x = - 10.5 + 7.2 \\ 0.9x = - 3.3x \\ x = - 3 \frac{2}{3}$

б)

$|5x - 4| = 9 \\ |5x - 4| - 9 = 0 \\ x1 = - 1 \: \: \: \: \: \: \: x2 = 2.6$