Which expression is equivalent to 2/3 x - 1/2 y - 4/5?
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1/3x-1/4y-4/5+1/3x-1/4y (that's the2nd option)
=1/3x+1/3x-1/4y-1/4y-4/5
=2/3x-2/4y-4/5
=2/3x-1/2y-4/5
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