SOLUTION: In a test, all questions were of equal value of 1 mark. If you answered 9 of the first 10 questions correctly, but only 3/10 of the remaining questions correctly, you would have sc

Question 1041108: In a test, all questions were of equal value of 1 mark. If you answered 9 of the first 10 questions correctly, but only 3/10 of the remaining questions correctly, you would have scored 50% for the whole test. If let x be the number of questions in the test, make an equation and find x.
I'm not sure how to make the equation, please help. I found that the score of the remaining questions is 3/10 (x-10).
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
There are questions on the test.
Of the first ten, you answer 9 correctly.
That leaves questions left on the test since,

So then scoring (3/10) of the remaining gives you,
additional correct answers.
So the total number of correct answers is,

and that equals 50% of all of the questions, X.

Multiply both sides by 10.

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