ElectricPavlov

A    put in x=10   to show the same value is calculated on each side of the equation

B   x cannot be -1/2     the denominator would be zero....not allowed

C   Put Right side over common denominator (2x+1)

     [   2x^2 (2x+1)  + 5 (2x+1) + 4 ]   / (2x+1)

        [ 4x^3 + 2x^2  + 10x + 5 + 4  ] / (2x+1)      This exactly the same as the expression on the LEFT

                           so any 'x' value (except -1/2) will make this equation true

*** EDIT ***

add the two angles 40 and 28 for BXE

BLUE  are   5  out of  (2+2+5+7) =   5 / 16   of 320

5/16 * 320 = ........

AXF = 90     add the two angles 10 and 28 for BXE

$ 8500 - 4236.87  + 3200 - 989.42 = available credit =  $ .........

I think you meant she pays a 10 % deposit

10 % of 234900 =   .10( 234900) = $ ............

2  I assume there is only the 20 students in the class

        CUMULATIVE average

                ( 12*92   +   8 * 96 ) / ( 12 + 8 ) = ...........

1   x = stock price

     40% decrease    leaves 60% value   =  .6x

     then a 50% increase         .6x  *   1.5 = .9x     .9 means the stock is worth 90% of its original price (10 decrease from original price)

First train has a 50 m/hr x 3 hr = 150 mile head start

Second train is going 60 - 50 = 10 m/hr faster and will close this 150 mile distance

  in 15 hours to catch the first train

2pm + 3 hours + 15 hours = 8 am

Let x = .7166666....

100x then = 71.666

1000x then = 716.666

1000x - 100x   then =  716.666-71.666

900x = 645

then

x = 645/900 = 43/60