7+9x=25+7x-4

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Solution for 7+9x=25+7x-4 equation: 



7+9x=25+7x-4

We move all terms to the left:

7+9x-(25+7x-4)=0

We add all the numbers together, and all the variables

9x-(7x+21)+7=0

We get rid of parentheses

9x-7x-21+7=0

We add all the numbers together, and all the variables

2x-14=0

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

2x=14

x=14/2

x=7

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