Question

Решите уравнения 3 × |5 - х| = 21; 2) |х - 4| × 6 =18; 3) 2 × |4х - 9| - 5 = 1; 4) 7 × |2х - 3| - 23 = 12

Answer 1

$1) - 2 \\ 2) =7 \\ 3)3 \\ 4)4$