Question

If x=-1, then which of the following equations makes a true statement? A. 4x+9= 20 B. -4x-5=-15 C. -3x+15=-22

Answer 1

When x = -1, the equation -4x - 5 = -15 makes a true statement.

Step-by-step explanation:

To check which equation makes a true statement when x = -1, we substitute x = -1 into each equation and see which equation results in a true equality. Let's do that:

1. A. 4x + 9 = 20: Substitute x = -1: 4(-1) + 9 = -4 + 9 = 5. This equation is not true.
2. B. -4x - 5 = -15: Substitute x = -1: -4(-1) - 5 = 4 - 5 = -1. This equation is true.
3. C. -3x + 15 = -22: Substitute x = -1: -3(-1) + 15 = 3 + 15 = 18. This equation is not true.

So, the equation B. -4x - 5 = -15 makes a true statement when x = -1.