104=42+9x+7x+30

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Solution for 104=42+9x+7x+30 equation: 



104=42+9x+7x+30

We move all terms to the left:

104-(42+9x+7x+30)=0

We add all the numbers together, and all the variables

-(16x+72)+104=0

We get rid of parentheses

-16x-72+104=0

We add all the numbers together, and all the variables

-16x+32=0

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

-16x=-32

x=-32/-16

x=+2

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