Question

the teacher tells the class that the highest marks obtained by a student in her class is twice the lowest mark plus7. the highest score is 87 .what is the lowest score ?

Answer 1

let the highest mark b x and lowest mark be y then the equation will be
x = 2 Y + 7
87=2y+7.
87-7=2y
80=2y.
y=80/2
y=40..marks

Answer 2

Answer:

$Lowest \:score =40$

Step-by-step explanation:

$Let\: Lowest \:score \: in \:the \:class = x$

$Heighest \:score = 87$

$\implies Twice \:the \: Lowest \: score +7=87$

$\implies 2x+7=87$

$\implies 2x=87-7$

$\implies 2x=80$

$\implies x = \frac{80}{2}$

$\implies x = 40$

Therefore,.

$Lowest \:score =x=40$

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