21=1.4(x-1)

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Solution for 21=1.4(x-1) equation: 



21=1.4(x-1)

We move all terms to the left:

21-(1.4(x-1))=0



We calculate terms in parentheses: -(1.4(x-1)), so:

1.4(x-1)

We multiply parentheses

1.4x-1.4

Back to the equation:

-(1.4x-1.4)



We get rid of parentheses

-1.4x+1.4+21=0

We add all the numbers together, and all the variables

-1.4x+22.4=0

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

-1.4x=-22.4

x=-22.4/-1.4

x=+16

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