Answer:
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20\2=10
10\2=5
5\2=2.5
2.5\2=1.25
6.4 - 2x - 6.63x = 610.5
subtract 6.4 from both sides
-2x -6.63x =604.1
collect like terms
-8.63x = 604.1
divide both sides by -8.63
x= -70
Answer:
6 units is the answer im pretty sure