21=-7/8x

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Solution for 21=-7/8x equation: 



21=-7/8x

We move all terms to the left:

21-(-7/8x)=0



Domain of the equation: 8x)!=0

x!=0/1

x!=0

x∈R



We get rid of parentheses

7/8x+21=0

We multiply all the terms by the denominator


21*8x+7=0

Wy multiply elements

168x+7=0

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

168x=-7

x=-7/168

x=-1/24

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