exam Maths Puzzle Numerical Ability

How do you work these problems? I have no Idea where to start! Help!

Solve and graph the solution:

-12 is greater than or equal to 24x

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exam Other Question

graph the followng inequality
y<= 2x-2 Hello,
I am not understanding these percentage problems. If you could help me solve this problem it would be greatly appreciated.
A retired couple earned $656 last year from inve