Question

Here are Janet's steps for solving the system below by eliminating x.
2x + 3y = -1
5x + 8y = 0
Step One: Multiply the first equation by 5. 10x + 15y = -5
Step Two: Multiply the second equation by -2. -10x - 16y = 0
Step Three: Add the two equations. y = -5
Step Four: Substitute y back into the first equation. 2x + 3(-5) = -1
Step Five: Solve for x.
2x - 15 = -1
2x = 14
x = 7
Is she correct? Justify your answer. If incorrect, describe the error.