Bright Shadows - Logic 2: "Get the addends!"

Description:

45 is split into 4 addends: 45=x1+x2+x3+x4. Also known is

x1+2 = x2-2 = x3*2 = x4/2

Get the addends and enter the solution as x1_x2_x3_x4 (for example: 1_2_3_4).

_______________    _________

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Solution:

1. This challenge is very easy. It's just a math problem.
2. 45=x1+x2+x3+x4

   x1+2=x2-2 ===> x2=x1+4
   x1+2=x3*2 ===> x3=x1/2+1
   x1+2=x4/2 ===> x4=2x1+4

3. So, the answer will be

   45=x1+(x1+4)+(x1/2+1)+(2x1+4)
   72=9x1
   x1=8, x2=12, x3=5, x4=20

4. Input 8_12_5_20 ! Well done!