Question

3
The teacher tells the class that the highest marks obtained by a student in her dass
is twice the lowest marks plus 10. The highest score is 90. What is the lowest
score?​

Answer 1

Answer:40

Step-by-step explanation:

Let the lowest marks = x

then, highest marks = 2x+10

It is given that the highest marks = 90

so, 2x+10=90

    2x=80

      x=40

Answer 2

Answer:

40

Step-by-step explanation:

Let x be the highest marks scored by a student and y be the lowest marks scored by a student.

According to the question,

x=2y+10

90=2y+10

90-10=2y

80=2y

80/2=y

y=40

Therefore the lowest scored is 40.