3(w+7)=-9

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Solution for 3(w+7)=-9 equation: 



3(w+7)=-9

We move all terms to the left:

3(w+7)-(-9)=0

We add all the numbers together, and all the variables

3(w+7)+9=0

We multiply parentheses

3w+21+9=0

We add all the numbers together, and all the variables

3w+30=0

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

3w=-30

w=-30/3

w=-10

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