A=7x+2(5-x)+10

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Solution for A=7x+2(5-x)+10 equation: 



=7A+2(5-A)+10

We move all terms to the left:

-(7A+2(5-A)+10)=0

We add all the numbers together, and all the variables

-(7A+2(-1A+5)+10)=0



We calculate terms in parentheses: -(7A+2(-1A+5)+10), so:

7A+2(-1A+5)+10

We multiply parentheses

7A-2A+10+10

We add all the numbers together, and all the variables

5A+20

Back to the equation:

-(5A+20)



We get rid of parentheses

-5A-20=0

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

-5A=20

A=20/-5

A=-4

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