Class has 50 question test, each correct answer is 2 pt, each wrong is -.5, if no answer then no points. If student needs to earn 70 pt on the test then what is the equation in terms of incorrect answers

Question

Class has 50 question test, each correct answer is 2 pt, each wrong is -.5, if no answer then no points.  If student needs to earn 70 pt on the test then what is the equation in terms of incorrect answers

triciaal · Answer

number correct = x number incorrect = 50-x 
when all correct x = 50  ; points = 100
when all incorrect  50*(-0.5) = -25 points 
to get 70 points   2x -0.5(50-x)= 70

anonymous · Answer

so you dont solve for x but state its 50?

triciaal · Answer

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