Answer:Add them up
Step-by-step explanation:
X=6 because
9-6=3
X=3 because
2•3=6
X=2 because
1.5 or 1 1/2 • 2 = 3
Not sure if this was what you needed or not!
2 adults = 5.50 x 2 = 11
3 students = 4.25 x 3 = 12.75
Total = $23.75
Greetings!Simplify.
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Distribute the Parenthesis.
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Combine Like Terms.
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
Hope this helps.
-Benjamin