X(n)+X(n+1)=55

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Solution for X(n)+X(n+1)=55 equation: 



X(X)+X(X+1)=55

We move all terms to the left:

X(X)+X(X+1)-(55)=0

We multiply parentheses

X^2+XX+X-55=0

We add all the numbers together, and all the variables

X^2+X+XX-55=0

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

X^2+X+XX=55

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