Question

the teacher tells the class that the highest
Mark obtained by a student in Monthly
Class test is twice the lowest Mark plus 5
If the highest Marks is 85. Form an equation​
to find the lowest Mark?​

Answer 1

Answer:

Let the lowest marks be x;

2x+5=85

2x=85-5

2x=80

x=80/2

x=40

Lowest Marks=40

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Answer 2

Given

Lowest Marks ⇒ x

Highest Marks ⇒ 2x + 5 = 85

$\rule{300}{1}$

To Find

The lowest mark.

$\rule{300}{1}$

Solution

Let the lowest mark be 'x'. To find the lowest marks obtained we need to solve this equation ⇒ 2x + 5 = 85

Let's solve your equation step-by-step.

2x + 5 = 85

Step 1: Subtract 5 from both sides of the equation.

⇒ 2x + 5 - 5 = 85 - 5

⇒ 2x = 80

Step 2: Divide 2 from both sides of the equation.

⇒ 2x ÷ 2 = 80 ÷ 2

⇒ x = 40

Let's verify if 40 is the lowest mark obtained.

⇒ 2x + 5 = 85

⇒ (2 × 40) + 5 = 85

⇒ 80 + 5 = 85

⇒ 85 = 85

∴ LHS = RHS

∴ The lowest marks obtained is 40.

$\rule{300}{1}$