X+2y=7.

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Solution for X+2y=7. equation: 



X+2X=7.

We move all terms to the left:

X+2X-(7.)=0

We add all the numbers together, and all the variables

X+2X-7=0

We add all the numbers together, and all the variables

3X-7=0

We move all terms containing X to the left, all other terms to the right

3X=7

X=7/3

X=2+1/3

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