Question

Andrea

says the solution to the equation 8 + 4 = 2(x – 1) isx=8.

a. Verify is Andrea's solution is correct?

b. How do you know it is correct or not based on what you
did?

Answer 1

a. Andrea is incorrect

b. By solving for x, we find that x does not equal 8, but it is equal to 7.

Explanation:

8+4=2(x-1)

8+4=2x-2

12=2x-2

14=2x

x=7