92(.20)+95(0.3)+88(0.2)+x(.30)=90

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Solution for 92(.20)+95(0.3)+88(0.2)+x(.30)=90 equation: 



92(.20)+95(0.3)+88(0.2)+x(.30)=90

We move all terms to the left:

92(.20)+95(0.3)+88(0.2)+x(.30)-(90)=0

determiningTheFunctionDomain
x(.30)-90+92(.20)+95(0.3)+88(0.2)=0

We add all the numbers together, and all the variables

x(0.3)-90+92(0.2)+95(0.3)+88(0.2)=0

We add all the numbers together, and all the variables

x(0.3)-25.5=0

We multiply parentheses

0.3x-25.5=0

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

0.3x=25.5

x=25.5/0.3

x=85

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