Step 1: 5 (2x + 5) = 100 Step 2: 10x + 5 = 100

Step 3: 10x = 95

Step 4: x = 9.5

What error did Andy make, and what is the correct solution to his problem?

He didn't state the collection of like term in step 1

Step-by-step explanation:

Step 1: 5 (2x + 5) = 100

5*2x+5*5=100

10x + 25=100

Step2:Collect like term

10x = 100-25

Step 3:

10x = 75

Step 4: divide both side by 10

10x/10 = 75/10

X = 7.5

He did not distribute the 5 to 5 so step two had to look like 10x+25=100