The sum of two numbers is -1. if one number is subtracted from the other, their difference is 11. find the numbers.

the solution is (5, -6)

Step-by-step explanation:

Let the numbers be x and y.  Then x + y = -1 (meaning that either x or y is negative), and x - y = 11.

Solve the system:

x + y = -1

x - y = 11

2x    = 10, or x = 5.  If x = 5, then x - y = 11 becomes 5 - y = 11, or y = -6.

Then the solution is (5, -6).

Is the sum of 5 and -6 equal to -1?  YES.

If -6 is subtracted from +5, is the difference 11?  Yes.

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: