1-4a+8=21

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Solution for 1-4a+8=21 equation:



1-4a+8=21
We move all terms to the left:
1-4a+8-(21)=0
We add all the numbers together, and all the variables
-4a-12=0
We move all terms containing a to the left, all other terms to the right
-4a=12
a=12/-4
a=-3

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