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 score is 67. What is the lowest score?
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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 score is 67. What is the lowest score?
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Answer:
30
Step-by-step explanation:
Just do opposite of that
67-7 = 60
60/2 = 30 since the answer is 30
Let the lowest mark be x+7
highest mark=67
= 2x+x+7=67
=3x=67-7
=x=60/3
=x=20