y=|x-2|

y=3

方程式$|x-2|=3$の解を，
グラフの交点から確認してみましょう．

f(x) = abs(x - 2)
A = Intersect(f, a, (-1, 3))
B = Intersect(f, a, (5, 3))
C = Point(xAxis)
b = Segment(A, C)
D = Point(xAxis)
c = Segment(B, D)