Question

Please answer 53 points.

Answer 1

He messed up in Step 2.

Explanation:

Step 1 is correct. The student correctly distributed the 5 to the values in the parentheses, following PEMDAS rule.

Step 2 is incorrect because the student added the 20 to the left side of the equation. Instead, because 20 is positive, he should have subtracted the 20 from both sides.

Step 3 is correct. To isolate the variable, he divided both sides by the coefficient.

Answer 2

`\huge\boxed{\sf Step \ 2}`

Explanation:

Given Equation:

-5 = 5(d + 4)

Step 1: Distribute

-5 = 5d + 20

Step 2: Subtract 20 to both sides

-5 - 20 = 5d

-25 = 5d

Step 3: Divide 5 to both sides

-5 = d

Answer:

• Markson did mess up.
• He messed up in Step 2 where he added 20 to both sides instead of subtracting 20 to both sides.

`\rule[225]{225}{2}`