21=x(.3)

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Solution for 21=x(.3) equation:



21=x(.3)
We move all terms to the left:
21-(x(.3))=0
We add all the numbers together, and all the variables
-(x(0.3))+21=0
We calculate terms in parentheses: -(x(0.3)), so:
x(0.3)
We multiply parentheses
0.3x
Back to the equation:
-(0.3x)
We add all the numbers together, and all the variables
-(+0.3x)+21=0
We get rid of parentheses
-0.3x+21=0
We move all terms containing x to the left, all other terms to the right
-0.3x=-21
x=-21/-0.3
x=+70

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