2x + 15 = 3 3a - 7 = 8 3m + 6 = - 12
2x = 3 - 15 3a = 8 + 7 3m = - 12 - 6
2x = - 12 3a = 15 m = - 18 x = - 12 : 2 a = 15 : 3 x = - 6 a = 5
3, 2y + 6 = 1, 2 9, 5m - 2, 3 = 1, 7 - 9 + 20x = - 26
3, 2y = 1, 2 - 6 9, 5m = 1, 7 + 2, 3 20x = - 26 + 9
3, 2y = - 4, 8 9, 5m = 4 20x = - 17 y = - 4, 8 : 3, 2 m = 4 : 9, 5 x = - 17 : 20 y = - 1, 5 m = 0, 4 x = - 0, 85
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" />n + 6 = 15 3a - <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" /> = - 5
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" />n = 15 - 6 3a = - 5 + <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" />
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" />n = 9 3a = <img src="https://tex.z-dn.net/?f=%20%28-%5Cfrac%7B9%7D%7B2%7D%29%20" /> n = 9 : <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20" /> a = <img src="https://tex.z-dn.net/?f=%20%28-%5Cfrac%7B9%7D%7B2%7D%29%20" /> : 3 n = 18 a = <img src="https://tex.z-dn.net/?f=%20-%5Cfrac%7B3%7D%7B2%7D%20" />.