3+9x=4x-7

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Solution for 3+9x=4x-7 equation: 



3+9x=4x-7

We move all terms to the left:

3+9x-(4x-7)=0

We get rid of parentheses

9x-4x+7+3=0

We add all the numbers together, and all the variables

5x+10=0

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

5x=-10

x=-10/5

x=-2

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