9+4a=1+2a

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Solution for 9+4a=1+2a equation: 



9+4a=1+2a

We move all terms to the left:

9+4a-(1+2a)=0

We add all the numbers together, and all the variables

4a-(2a+1)+9=0

We get rid of parentheses

4a-2a-1+9=0

We add all the numbers together, and all the variables

2a+8=0

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

2a=-8

a=-8/2

a=-4

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