0.5x=-21

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Solution for 0.5x=-21 equation: 



0.5x=-21

We move all terms to the left:

0.5x-(-21)=0

We add all the numbers together, and all the variables

0.5x+21=0

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

0.5x=-21

x=-21/0.5

x=-42

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