A-7=-3(b+2)

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Solution for A-7=-3(b+2) equation: 



-7=-3(A+2)

We move all terms to the left:

-7-(-3(A+2))=0



We calculate terms in parentheses: -(-3(A+2)), so:

-3(A+2)

We multiply parentheses

-3A-6

Back to the equation:

-(-3A-6)



We get rid of parentheses

3A+6-7=0

We add all the numbers together, and all the variables

3A-1=0

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

3A=1

A=1/3

A=1/3

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