Please someone help me ive tried to do it myself but i dont seem to understand can someone explain how to do it step by step from me

Answer:
170x+240y<2000
Step-by-step explanation:
sunrise- 170x
twilight- 240y
both of them added together has to equal/ be less than 2000
since i can't do the less than or equal to sign you will have to pretend there is a line under the < sign
<
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