Question

WILL CHOOSE BRAINLIEST as long as it LOOKS correct

Mai and Tyler work on the equation 2 5 b + 1 = - 11 together. Mai's solution is b = - 25 and Tyler's is b = - 28 . Here is their work:


Mai:

2 5 b + 1 = - 11

2 5 b = - 10

b = - 10 ⋅ 5 2

b = - 25


Tyler:

2 5 b + 1 = - 11

2 b + 1 = - 55

2 b = - 56

b = - 28


Do you agree with their solutions? Explain or show your reasoning.

Answer 1

Answer:

I do not agree with the solutions, b=-30, reasoning below.

Step-by-step explanation:

Mai made an error between the first and second line, she added one to the right when she should have subtracted one:

2/5b+1=-11

2/5b=-12

She then multiplied by 5/2 which was correct, however she multiplied it by -10 when it should have been -12:

b=-12*5/2

b=-30

Tyler made an error between the first and second line when he did not multiply the 1 on the left by 5 also:

2/5b+1=-11

2b+5=-55

He did the next steps correctly, however he had the incorrect value, it should look like this:

2b=-60

b=-30