-140=-7(6-7a)

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Solution for -140=-7(6-7a) equation: 



-140=-7(6-7a)

We move all terms to the left:

-140-(-7(6-7a))=0

We add all the numbers together, and all the variables

-(-7(-7a+6))-140=0



We calculate terms in parentheses: -(-7(-7a+6)), so:

-7(-7a+6)

We multiply parentheses

49a-42

Back to the equation:

-(49a-42)



We get rid of parentheses

-49a+42-140=0

We add all the numbers together, and all the variables

-49a-98=0

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

-49a=98

a=98/-49

a=-2

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