Question

→como resolver essa inequacao 3r-4(2r-8)+5r ≤4r+1 ?? ←
↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

Answer 1

3r - 4.(2r - 8) + 5r ≤ 4r + 1
3r - 8r + 32 + 5r ≤ 4r + 1
- 5r + 5r + 32 ≤ 4r + 1
32 ≤ 4r + 1
- 4r ≤ 1 - 32
- 4r ≤ - 31 (-1)
4r ≥ 31
r ≥ 31/4

R.: {x ∈ R / r ≥ 31/4}