solve abs(x+1)=4
Let's solve in ℝ: abs(x + 1) = 4
abs(A) = B means that: A = B or A = -B
Let's solve in ℝ: x + 1 = 4
x = 4 -1
Solution found: x = 3
Let's solve in ℝ: x + 1 = -4
x = -4 -1
Solution found: x = -5
▷Result:   x = { -5, 3 }