|3x + 1 4/15| + 2/3 при x = -1,2 получается.
|-3,6+1 4/15|+2/3 = |-3 9/15+1 4/15|+2/3 = |-2 5/15|+2/3 = 2 1/3+2/3 = 3
11 + |3/8*x - 5/6| при x = -4/9
11 + |3/8*(-4/9) - 5/6| = 11 + |-1/6 - 5/6| = 11 + |-1| = 11 + 1 = 12
8/9 + |1/12*x - 7/9| при x = -4
8/9 + |-4/12 - 7/9| = 8/9 + |-3/9 - 7/9| = 8/9 + |-10/9| = 8/9 + 10/9 = 18/9 = 2