Find out the total discount percentage that students receive.
20% + 10% = 30%
30/100 x 30 = 9 dollars
30 - 9 = 21 dollars (Final answer)
Answer:
x > 8
Step-by-step explanation:

Hope this helps.
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What you are asking is

we need to make the fractions improper now,

now we need common denominators:

we get

OR