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32 votes
32 votes
21y > 84can you help me solving this?

User Yumetodo
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1 Answer

16 votes
16 votes

Given the inequality


21y>84

We solve it as following:


21y>84\rightarrow(21y)/(21)>(84)/(21)\rightarrow y>4

Thereby, y has to be greater than 4.


y>4

As an interval,


y\in(4,\infty)

NOTE: Remember that dividing or multiplying an inequality by a negative number turns it around! Here we divided by 21, so it stayed the same.

User Batichico
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2.9k points