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Li and K both have one electron in their outer shell and therefore perform chemical reactions in a similar way and share certain characteristics.

Osmosis is the net movement of water molecules from an area of high water potential to low water potential, commonly across a partially permeable membrane such as a cell's surface membrane.

13-x-3>4x
10>4x+x
10>5x
2>x
x<2

1. Label your equations 1 and 2.
2. Look to eliminate one of your variables to create a third equation with only one variable.
3. To do this multiply the first equation by 2 to obtain: 6x +...

Write x in terms of y using one of the equations. Then substitute it in the second equation, which is then only in terms of y. Find y. Then you can easily find x.

Answer: x = 6 and y = 4.