7x+9=4x-30

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Solution for 7x+9=4x-30 equation: 



7x+9=4x-30

We move all terms to the left:

7x+9-(4x-30)=0

We get rid of parentheses

7x-4x+30+9=0

We add all the numbers together, and all the variables

3x+39=0

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

3x=-39

x=-39/3

x=-13

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