21x=-8.4

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Solution for 21x=-8.4 equation: 



21x=-8.4

We move all terms to the left:

21x-(-8.4)=0

We add all the numbers together, and all the variables

21x+8.4=0

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

21x=-8.4

x=-8.4/21

x=-6/15

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