# Changing Numbers To Prescribed Values Under Special Limitations

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• Feb 9th 2013, 04:33 AM
perry
Changing Numbers To Prescribed Values Under Special Limitations
x=1825+91/1217
y=7+2/3
z=1827+2/3

Is there any way to turn x into z only using the first two terms, andor a constant, and the operators '+','-','*','/'.

I know I can take ((x)-(x mod 10)) + y = z, but this uses a modulus.

... Basically the core of the question is can I change any number's last digit and its decimal value to something I decide by only using the number itself and the desired digit and decimal?

... I feel like splitting the numerator and denominator and running independent operations on each might be the way to go.
• Feb 9th 2013, 12:53 PM
HallsofIvy
Re: Changing Numbers To Prescribed Values Under Special Limitations
I have no idea what you mean by "turn x into z". I would guess that you want an equation setting "z= " something to do with x. x is equal to 1825+ 9/1217 while z is equal to 1825+ 2+ 2/3. Okay, y= 7+ 2/3 so you could add y and subtract 5 to go from 1825+ 1827. Then, you would need to subtract 9/1217 to get rid of that fraction. That seems a very strange way to do a subtraction! If you were required to include that "y", you would just subtract x from z to see what needed to be added.