X*2.5+y=7

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Solution for X*2.5+y=7 equation: 



X*2.5+X=7

We move all terms to the left:

X*2.5+X-(7)=0

We add all the numbers together, and all the variables

X+X*2.5-7=0

Wy multiply elements

X+2.5X-7=0

We add all the numbers together, and all the variables

3.5X-7=0

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

3.5X=7

X=7/3.5

X=2

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