63 умножить на 14 и полущившися ответ разделить на 14
![\left \{ {{I+229=max} \atop {I/3=II}} \right. \\ \left \{ {{3II+229=max} \atop {I=3II}} \right. \\ \left \{ {{II= \frac{ max-229}3} \atop {I=3II}} \right. \\ ](https://tex.z-dn.net/?f=+%5Cleft+%5C%7B+%7B%7BI%2B229%3Dmax%7D+%5Catop+%7BI%2F3%3DII%7D%7D+%5Cright.+%5C%5C%0A+%5Cleft+%5C%7B+%7B%7B3II%2B229%3Dmax%7D+%5Catop+%7BI%3D3II%7D%7D+%5Cright.+%5C%5C%0A+%5Cleft+%5C%7B+%7B%7BII%3D+%5Cfrac%7B+max-229%7D3%7D+%5Catop+%7BI%3D3II%7D%7D+%5Cright.+%5C%5C%0A%0A)
Высота второй сосны равна трети от максимального роста, уменьшенного на 229 см.
3)
x - 7 = 14
x = 14 + 7
x = 21
4)
21 - 5x = 6
-5x = 6 - 21
-5x = -15
x=3
5)
x + x + 4 + x = 16
3x = 16 - 4
3x = 12
x = 12/3
x = 4
6)
<span>х + 5 + х + 6 = 21
</span>2x = 21 - 11
2x = 10
x = 10/2
x = 5
7)
<span>х + 2х - 5 = 40
</span>3x = 40 + 5
3x = 45
x = 45/3
x = 15
8)
0.1x = 3
x = 3/0.1
x = 3 * 10
x = 30