Question 263566
1. 200= 210/(1+x)
step 1 - multiply by 1+x to get
{{{200(1+x) = 210}}}
distribute to get
{{{200 + 200x + 210}}}
subtract to get
{{{200x = 10}}}
divide to get
{{{x = 1/20}}}
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2. 110.00 = 133.10/(1+x)^2
step 1 - multiply by (1+x)^2 to get
{{{110(1+x)^2 = 133.10}}}
step 2- divide by 110 to get
{{{(1+x)^2 = 1.21}}}
square root both sides to get
{{{1+x = +-1.1}}}
subtract 1 to get
 {{{x = -1 +- 1.1}}}
so,
x = -.1
or
x = -2.1
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3. 0.08243=〖[1+x/4]〗4 - 1
--> not sure what we have on this one :((
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4. 34.99=100e^x
step 1 - divide by 100 to get
{{{.3499 = e^x}}}
step 2 - ln both sides to get
{{{x = -1.05010}}}