64.90=(x+4.30)+(x-7.80)

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Solution for 64.90=(x+4.30)+(x-7.80) equation: 



64.90=(x+4.30)+(x-7.80)

We move all terms to the left:

64.90-((x+4.30)+(x-7.80))=0

We add all the numbers together, and all the variables

-((x+4.3)+(x-7.8))+64.90=0

We add all the numbers together, and all the variables

-((x+4.3)+(x-7.8))+64.9=0



We calculate terms in parentheses: -((x+4.3)+(x-7.8)), so:

(x+4.3)+(x-7.8)

We get rid of parentheses

x+x+4.3-7.8

We add all the numbers together, and all the variables

2x-3.5

Back to the equation:

-(2x-3.5)



We get rid of parentheses

-2x+3.5+64.9=0

We add all the numbers together, and all the variables

-2x+68.4=0

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

-2x=-68.4

x=-68.4/-2

x=34+0.40000000000001/2

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