Hey! Btw, this is math... not biology. xD
2 = -1 -2x - 1
(plus 1 to get rid of the 1, then add it to the 2)
3 = -1 -2x
(plus 1 again to get rid of the other 1, then add it to the 3)
4 = -2x
(divide -2x with -2, then divide 4 with -2)
Answer: -2 = x
