15x+21=-204

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Solution for 15x+21=-204 equation: 



15x+21=-204

We move all terms to the left:

15x+21-(-204)=0

We add all the numbers together, and all the variables

15x+225=0

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

15x=-225

x=-225/15

x=-15

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