9
work shown:
e-7=16
+7= 0 (you need to get x alone and what you do to one side of the = sign you must do to the other)
then do 16- 7= 9
so your answer is: e=9
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13=e+2 11=e (subtract 2 from each side)
It depends on what you mean by "solve". This is the "ambiguous" case so that there are two possible solutions depending on whether F is acute or obtuse. Assuming one or the other, the sine rule will give you angle E and so angle F can be calculated and, from that, side f.
In this case, trial and error is probably the easiest: 22 = 4, 23 = 8, 24 = 16 yes! A more genral answer is: the power that you want is log(16)/log(2) where the logarithm is calculated to any base (10 or e , or indeed any other).
There are two ways to solve this. One is using the definition of logarithms: solve the equation 4x = 16. This can be done by inspection, in this case. The other is to use a change-of-base, to change to a base your calculator can handle. For example, changing to base e: log416 = ln(16) / ln(4)
it means that u put sum numbers in a calculator and it will blow up the world '''fred rules''' '''fred figglehorn''' '''lauren xoxox'''