An airplane left Atlanta with 20 empty seats. If the airplane was 75% full, what was the total number of seats on the airplane?
1 answer:
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Answer:
Step-by-step explanation:
Given
Required
Find A, B and C
Rearrange the expression
To do this, we simply compare the expressions on both sides of the equation.
So, we have:
--- (1)
--- (2)
--- (3)
Divide both sides by x² in (1)
Divide both sides by x in (2)
Substitute 2 for A.
Make B the subject
Substitute 2 for A and -1 for B in (3)
Make C the subject