Mikayla and Jesse both solved the equation x−15=12−8, using substitution. Mikayla says the answer is x=19, and Jesse says the answer is x=27. Which student is correct, and how do you know? Show your work and explain your thinking

1 answer

The given equation is: x - 15 = 12 - 8

We can simplify the right-hand side of the equation as 12 - 8 = 4

Substituting this value in the equation, we get:

x - 15 = 4

Adding 15 to both sides, we get:

x = 19

Therefore, Mikayla is correct.

To verify, we can substitute the value of x as 19 in the given equation:

19 - 15 = 12 - 8

4 = 4

The equation is verified and thus, Mikayla's solution is correct.