10.5x+7500=7.5*(4000+x)

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Solution for 10.5x+7500=7.5*(4000+x) equation: 



10.5x+7500=7.5(4000+x)

We move all terms to the left:

10.5x+7500-(7.5(4000+x))=0

We add all the numbers together, and all the variables

10.5x-(7.5(x+4000))+7500=0



We calculate terms in parentheses: -(7.5(x+4000)), so:

7.5(x+4000)

We multiply parentheses

7.5x+30000

Back to the equation:

-(7.5x+30000)



We get rid of parentheses

10.5x-7.5x-30000+7500=0

We add all the numbers together, and all the variables

3x-22500=0

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

3x=22500

x=22500/3

x=7500

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