7x+21-3x=5+6x+30-4

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Solution for 7x+21-3x=5+6x+30-4 equation: 



7x+21-3x=5+6x+30-4

We move all terms to the left:

7x+21-3x-(5+6x+30-4)=0

We add all the numbers together, and all the variables

7x-3x-(6x+31)+21=0

We add all the numbers together, and all the variables

4x-(6x+31)+21=0

We get rid of parentheses

4x-6x-31+21=0

We add all the numbers together, and all the variables

-2x-10=0

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

-2x=10

x=10/-2

x=-5

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