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8x*40=4x*12
We move all terms to the left:
8x*40-(4x*12)=0
We add all the numbers together, and all the variables
8x*40-(+4x*12)=0
Wy multiply elements
320x-(+4x*12)=0
We get rid of parentheses
320x-4x*12=0
Wy multiply elements
320x-48x=0
We add all the numbers together, and all the variables
272x=0
x=0/272
x=0
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