7(15)=3(15)+x

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Solution for 7(15)=3(15)+x equation: 



7(15)=3(15)+x

We move all terms to the left:

7(15)-(3(15)+x)=0

We add all the numbers together, and all the variables

-(x+315)+715=0

We get rid of parentheses

-x-315+715=0

We add all the numbers together, and all the variables

-1x+400=0

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

-x=-400

x=-400/-1

x=+400

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