Vaishali scored 85 in test containing 100 problems and her score was calculated by subtracting two times the number of wrong answers from the number of correct answers.How many problem did he solve correctly? ----- help me meritnation to do this problem by using linear eqations in one variable

let the no of wrong ans be x ans

let the no of correct ans be 100-x

score was calculated by sub two times the no. of wrong ans(2x) from no of correct ans(100-x)

eq=100-x-2x=85

=-x-2x=85-100

=-3x=-15

=x=5

so no. of problems scored correctly by vaishali=100-x

=100-5

=95

ans =no. of problemssolved by her correctly are 95

good luck.

hope it helped.

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