Necesito ayuda con estas inecuaciones por favor 3x - 1÷2≤72x₊1≥x₊2÷3Ix₋1I≥4I2xI ≤9?

Explicación paso a paso : <img src="https://tex.z-dn.net/?f=3x-1%5Cdiv2%5Cleq7%5C%5C3x%5Cleq7%2B1%5Cdiv2%5C%5C3x%5Cleq7%2B%5Cfrac%7B1%7D%7B2%7D%5C%5C%5C%5C%5Cboxed%7B7%2B%5Cfrac%7B1%7D%7B2%7D%3D%5Cfrac%7B7%2A2%2B1%7D%7B2%7D%3D%5Cfrac%7B15%7D%7B2%7D%7D%5C%5C%5C%5C3x%5Cleq%5Cfrac%7B15%7D%7B2%7D%5C%5Cx%5Cleq%5Cfrac%7B15%7D%7B2%7D%2A%5Cfrac%7B1%7D%7B3%7D%5C%5Cx%5Cleq%5Cfrac%7B5%7D%7B2%7D" /><img src="https://tex.z-dn.net/?f=2x%2B1%5Cgeq%20x%2B2%5Cdiv3%5C%5C2x-x%5Cgeq%5Cfrac%7B2%7D%7B3%7D%2B1%5C%5C%5C%5C%5Cboxed%7B%5Cfrac%7B2%7D%7B3%7D%2B1%3D%5Cfrac%7B2%2B3%2A1%7D%7B3%7D%3D%5Cfrac%7B5%7D%7B3%7D%7D%5C%5C%5C%5Cx%5Cgeq%5Cfrac%7B5%7D%7B3%7D" /><img src="https://tex.z-dn.net/?f=%7Cx-1%7C%5Cgeq%204%5C%5C-4%5Cgeq%20x-1%5Cgeq%204%5C%5C-4%2B1%5Cgeq%20x-1%2B1%5Cgeq%204%2B1%5C%5C-3%5Cgeq%20x%5Cgeq%205" /><img src="https://tex.z-dn.net/?f=%7C2x%7C%5Cleq%209%5C%5C-9%5Cleq%202x%5Cleq%209%5C%5C-9%2A%5Cfrac%7B1%7D%7B2%7D%5Cleq%202x%2A%5Cfrac%7B1%7D%7B2%7D%5Cleq%209%2A%5Cfrac%7B1%7D%7B2%7D%5C%5C-%5Cfrac%7B9%7D%7B2%7D%5Cleq%20x%5Cleq%20%5Cfrac%7B9%7D%7B2%7D" />.