Could this pattern be expressed using algebra?

You score 4 marks for each correct answer and you lose one mark for each incorrect answer. The total number of questions is 25. If your final mark is 65, how many questions did you get right?

25 0 100 - 0 = 100
24 1 96 - 1 = 95
23 2 92 - 2 = 90
22 3 88 - 3 = 85
...
...
...
18 7 72 - 7 = 65

Question

Could this pattern be expressed using algebra?

You score 4 marks for each correct answer and you lose one mark for each incorrect answer. The total number of questions is 25. If your final mark is 65, how many questions did you get right?

25       0         100 - 0 = 100
24       1          96 - 1 = 95
23       2          92 - 2 = 90
22       3          88 - 3 = 85
...
...
...
18       7          72 - 7 = 65

anonymous · Answer

X is number of questions answered correctly

anonymous · Answer

Sorry x represents 25 because if you get all of them right you score 100

anonymous · Answer

You're right

anonymous · Answer

It's number of questions answered correctly

anonymous · Answer

Ill have a careful look at it and if I have any questions ill let you know. Thx for your help

anonymous · Answer

How did you come up with (25-x)*(-1) @redbullx

anonymous · Answer

@redbullx