(9x-45)+(-4x+45)=(4x+20)+(-4x+45)

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Solution for (9x-45)+(-4x+45)=(4x+20)+(-4x+45) equation: 



(9x-45)+(-4x+45)=(4x+20)+(-4x+45)

We move all terms to the left:

(9x-45)+(-4x+45)-((4x+20)+(-4x+45))=0

We get rid of parentheses

9x-4x-((4x+20)+(-4x+45))-45+45=0



We calculate terms in parentheses: -((4x+20)+(-4x+45)), so:

(4x+20)+(-4x+45)

We get rid of parentheses

4x-4x+20+45

We add all the numbers together, and all the variables

65

Back to the equation:

-(65)



We add all the numbers together, and all the variables

5x-65=0

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

5x=65

x=65/5

x=13

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