[x-1]+[x-3]=2 [x+1]+2x=7

•
|x - 1| + |x - 3| = 2
x - 1 + x - 3 = 2
2x = 4 + 2
x = 3

x - 1 + x - 3 = -2
2x = 4 - 2
x = 1

•
|x + 1| + 2x = 7
x + 1 = 7 - 2x
3x = 6
x = 2