4x+5=-8x+21

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Solution for 4x+5=-8x+21 equation: 



4x+5=-8x+21

We move all terms to the left:

4x+5-(-8x+21)=0

We get rid of parentheses

4x+8x-21+5=0

We add all the numbers together, and all the variables

12x-16=0

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

12x=16

x=16/12

x=1+1/3

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