2
s=-7/4
Well since an equation has an equal sign it is 6+7=13
n - 13 = 7
-2p+7.
2
does 7(9-3p) = 42p
4p+2 = 3p-7 4p-3p = -7-2 p = -9
3p+7 = 16+2p 3p-2p = 16-7 p = 9
s=-7/4
Well since an equation has an equal sign it is 6+7=13
3p - 8 = 13 - 4p : Add 4p to both sides 7p - 8 = 13 : Add 8 to both sides 7p = 21 : Divide both sides by 7 p = 3.
n - 13 = 7
The 3p subshell of chlorine has valence electrons. Chlorine has 7 valence electrons in the 3p subshell.
-2p+7.
3h+13 = 7 3h = 7-13 3h = -6 h = -2
3p + 18 = 5p + 4Subtract 4 from both sides3p + 14 = 5pSubtract 3p from both sides14 = 2pDivide both sides by 27 = pNote : For presentation purposes the unknown or variable is normally put as the subject of the equation. The answer is then presented as p = 7.