7(4-7a)=217

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Solution for 7(4-7a)=217 equation: 



7(4-7a)=217

We move all terms to the left:

7(4-7a)-(217)=0

We add all the numbers together, and all the variables

7(-7a+4)-217=0

We multiply parentheses

-49a+28-217=0

We add all the numbers together, and all the variables

-49a-189=0

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

-49a=189

a=189/-49

a=-3+6/7

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