text: plz plz plz. help me with this math. and rude answers are not welcome. thank you? 15: solve for x: | x + 2 | = | 2 - x | no solution  2, -2  0 only  2 only    16: solve for x: | 4 - x | = | 2x + 1 | -1 only  -1, 5  1, -1  1, -5    17: solve for x: | x/5 - 21/10 | = | x/2 | 3, -7  no solution  21/2 only  -3, 7    18: solve for x: | x/2 + 1/3 | = | x - 2/3 | 2, 0  -2, 0  2, 2/9  -2, -2/9 - 15, 0 only 16. 1, -5 17. no solution 18. 2, 2/9