CPhill

x - 2y = 8 

-x + 3y = 6

adding these equations, we get

y = 14

substitute this value into one of the equations to find x

x - 2(14) = 8

x - 28 = 8       add 28 to both  sides

x = 36

So the solution is  ( 36, 14)

37000(1.019)¹² = about  $46375.86

Let's look at this again

4(x+8)-4=34-2x      distribute the 4 on the left

4x + 32 - 4  = 34 - 2x    simplify

4x + 28 = 34 - 2x        add 2x to both sides and subtract 28 from both sides

6x = 6                         divide both sides by 6

x = 1

Correct, Tiddle.....

Very nice, Mathematician.......you're gonna' run me out of a job....!!!!

There is a way to evaluate this using a log....we have

16777216^2073600      take the log of this

 log 16777216^2073600    which we can write as

2073600  *  log 16777216  =  

This number is about

10^{.1762119523328} x 10^14981179  =   about

1.5 x 10^14981179 

Looks OK to me......

Good job, Mathematician......!!!

4x / 3 = 7 /15       we can just cross-multiply this and solve

4x * (15) = 3 * 7

60x = 21          divide both sides by 60

x =  [21 / 60 ]   =   7 x 3] /  [20 x 3 ]    =  7 /20