3(1-3x)=21(-4x+7)

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Solution for 3(1-3x)=21(-4x+7) equation: 



3(1-3x)=21(-4x+7)

We move all terms to the left:

3(1-3x)-(21(-4x+7))=0

We add all the numbers together, and all the variables

3(-3x+1)-(21(-4x+7))=0

We multiply parentheses

-9x-(21(-4x+7))+3=0



We calculate terms in parentheses: -(21(-4x+7)), so:

21(-4x+7)

We multiply parentheses

-84x+147

Back to the equation:

-(-84x+147)



We get rid of parentheses

-9x+84x-147+3=0

We add all the numbers together, and all the variables

75x-144=0

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

75x=144

x=144/75

x=1+23/25

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