Simplify (4x)/10 - (5y) /7 - (3x+4y)/5 ?

= 2x/5 - 5y/7 - (3x+4y)/5
= (2x-3x-4y)/5 - 5y/7
= -(x+4y)/5 - 5y/7
= (-7x -28y-25y)/35
= -(7x+53y)/35



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