Answer:
[tex]\sf x\ge \:4[/tex]
solving steps:
[tex]\sf 8\left(x-5\right)-3x\ge \:-20[/tex]
[tex]\sf \left(8x-40\right)-3x\ge \:-20[/tex]
[tex]\sf 5x-40\ge \:-20[/tex]
[tex]\sf 5x\ge \:-20+40[/tex]
[tex]\sf 5x\ge \:20\\[/tex]
[tex]\sf x\ge \:\dfrac{20}{5}[/tex]
[tex]\sf x\ge \:4[/tex]
