3a+7-1a=2(a+20)+12

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Solution for 3a+7-1a=2(a+20)+12 equation: 



3a+7-1a=2(a+20)+12

We move all terms to the left:

3a+7-1a-(2(a+20)+12)=0

We add all the numbers together, and all the variables

2a-(2(a+20)+12)+7=0



We calculate terms in parentheses: -(2(a+20)+12), so:

2(a+20)+12

We multiply parentheses

2a+40+12

We add all the numbers together, and all the variables

2a+52

Back to the equation:

-(2a+52)



We get rid of parentheses

2a-2a-52+7=0

We add all the numbers together, and all the variables

-45!=0

There is no solution for this equation

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