4a-9=7a=12

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Solution for 4a-9=7a=12 equation:



4a-9=7a=12
We move all terms to the left:
4a-9-(7a)=0
We add all the numbers together, and all the variables
-3a-9=0
We move all terms containing a to the left, all other terms to the right
-3a=9
a=9/-3
a=-3

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