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388=0.02x+0.03(x+600)
We move all terms to the left:
388-(0.02x+0.03(x+600))=0
We calculate terms in parentheses: -(0.02x+0.03(x+600)), so:We get rid of parentheses
0.02x+0.03(x+600)
We multiply parentheses
0.02x+0.03x+18
We add all the numbers together, and all the variables
0.05x+18
Back to the equation:
-(0.05x+18)
-0.05x-18+388=0
We add all the numbers together, and all the variables
-0.05x+370=0
We move all terms containing x to the left, all other terms to the right
-0.05x=-370
x=-370/-0.05
x=+7400
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