Question

QUESTION 10

When looking at her grades, Susan found that she scored a combined 258 points on her first three tests. She also noticed that on tests two and three, she
scored 10 points fewer than the test before.
Write an equation that fits this problem.

Answer 1

let the grade points be a,b,c

a+b+c=258

b=c+10( since she noticed that on tests two and three,she scored 10 points fewer).

Answer 2

• See below

Explanation:

Let the first test score is x, then the next two are x - 10 and x - 20 and the total of three is 258.

We can reflect this as:

• x + x - 10 + x - 20 = 258

Solving we get:

• 3x - 30 = 258
• 3x = 258 + 30
• 3x = 288
• x = 288/3
• x = 96

The scores are: 96, 86 and 76