Help me pleaseeeeee :(

Inequality Notation:
[tex]x \geqslant 4[/tex]
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[tex]5x - 20 \geqslant 0 \\ 5x - 20 + 20 \geqslant 0 + 20 \\ 5x \geqslant 20 \\ \\ \frac{5x}{5} \geqslant \frac{20}{5} \\ \\ x \geqslant 4[/tex]
I hope I helped you^_^