(x+4)+((x+9)+4)=91

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Solution for (x+4)+((x+9)+4)=91 equation: 



(x+4)+((x+9)+4)=91

We move all terms to the left:

(x+4)+((x+9)+4)-(91)=0

We get rid of parentheses

x+((x+9)+4)+4-91=0



We calculate terms in parentheses: +((x+9)+4), so:

(x+9)+4

We get rid of parentheses

x+9+4

We add all the numbers together, and all the variables

x+13

Back to the equation:

+(x+13)



We add all the numbers together, and all the variables

x+(x+13)-87=0

We get rid of parentheses

x+x+13-87=0

We add all the numbers together, and all the variables

2x-74=0

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

2x=74

x=74/2

x=37

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