8x+21=-57

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Solution for 8x+21=-57 equation: 



8x+21=-57

We move all terms to the left:

8x+21-(-57)=0

We add all the numbers together, and all the variables

8x+78=0

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

8x=-78

x=-78/8

x=-9+3/4

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