Answer:
6x + 10mm
Explanation:
first lets put all the sides into an equation
6mm + 6mm + (3x - 1mm) + (3x - 1mm)
then we simplify it
12mm + 6x -2mm
10mm + 6x
hope this helps <3
2(3x-1)+2(6)
6x-2+12
6x+10
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