b)2X+Y=13-X+6Y=45

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Solution for b)2X+Y=13-X+6Y=45 equation: 



b)2b+=13-b+6=45

We move all terms to the left:

b)2b+-(13-b+6)=0

We add all the numbers together, and all the variables

b)2b+-(-1b+19)=0

We add all the numbers together, and all the variables

-1b+b)2b+-(=0

We use the square of the difference formula

-1b+b)2b-(=0

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