.07x+(.02(8000-x))=380

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Solution for .07x+(.02(8000-x))=380 equation: 



.07x+(.02(8000-x))=380

We move all terms to the left:

.07x+(.02(8000-x))-(380)=0

We add all the numbers together, and all the variables

.07x+(.02(-1x+8000))-380=0



We calculate terms in parentheses: +(.02(-1x+8000)), so:

.02(-1x+8000)

We multiply parentheses

-0.02x+160

Back to the equation:

+(-0.02x+160)



We get rid of parentheses

.07x-0.02x+160-380=0

We add all the numbers together, and all the variables

0.05x-220=0

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

0.05x=220

x=220/0.05

x=4400

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