SOLUTION: A student scored 78 on a test that had 4 seven point fill ins and 24 three point multiple choice questions, the student had one fill in wrong how many multiple choice questions did

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Question 370527: A student scored 78 on a test that had 4 seven point fill ins and 24 three point multiple choice questions, the student had one fill in wrong how many multiple choice questions did the student answer correctly? Can you help me? Thank you! Shelly
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = # of multiple choice questions answered correctly.


So because "A student scored 78 on a test" and "the student had one fill in wrong", this must mean that 3%2A7%2B3x=78


Note: because the student missed one fill in question, this means that s/he got 3*7 points so far.


3%2A7%2B3x=78 Start with the given equation.


21%2B3x=78 Multiply


3x=78-21 Subtract 21 from both sides.


3x=57 Combine like terms on the right side.


x=%2857%29%2F%283%29 Divide both sides by 3 to isolate x.


x=19 Reduce.


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Answer:

So the solution is x=19


This means that the student answered 19 multiple choice questions correctly.


If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my tutoring website

Jim