Очень надо.Решите уравнения:
|7х-2|=0

|5х-4|=0

|10х-1|=0

|7x-2| = 0 -> 7x-2=0 -> 7x = 2 -> x = 2/7|5x-4| = 0 -> 5x - 4 = 0 -> 5x = 4 -> x = 4/5|10x - 1| = 0 -> 10x -1 = 0 -> 10x = 1 -> x = 1/10

|7х-2|=0  7х-2=0    7x=0+2   7x=2x=7:2x=3,5|5х-4|=05х-4=05х=0+45х=4х=4:5х=0.8|10х-1|=010х-1=010x=0+110x=1x=1:10х=0.1