7x-2(-7x+23)=-256

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Solution for 7x-2(-7x+23)=-256 equation: 



7x-2(-7x+23)=-256

We move all terms to the left:

7x-2(-7x+23)-(-256)=0

We add all the numbers together, and all the variables

7x-2(-7x+23)+256=0

We multiply parentheses

7x+14x-46+256=0

We add all the numbers together, and all the variables

21x+210=0

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

21x=-210

x=-210/21

x=-10

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