Question

This one is very hard for me

Answer 1

`x \geqslant 4.8`

Explanation:

`15x \: \: \: \: + \: 57 \geqslant 129 \\ or \: 15x \geqslant 129 - 57 \\ or \: x \geqslant 72 / 15 \\ or \: x \geqslant 4.8 \\`

Answer 2

15x + 57 ≥ 129

15x ≥ 129 - 57

15x ≥ 72

x ≥ 24/5

x ≥ 4.8