1+2a=9

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Solution for 1+2a=9 equation:



1+2a=9
We move all terms to the left:
1+2a-(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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