1.

the teacher tells the class that the highest marks obtained by a student in her class is twice the lowest marks plus 7 .the highest marks is 87.what is the lowest marks

Answer»

LET the lowest MARKS = X


Highest marks = 2 * x + 7

87 = 2 * x +7

2x = 87 - 7

2x = 80

x = 40 is the lowest marks



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