Ответ:
Объяснение:
7x-(2y-(4y+(3y-5x)))= 7x-(2y-(4y+3y-5x)= 7x-(2y-(7y-5x))=
=7x-(2y-7y+5x)= 7x-(-5y+5x)= 7x+5y-5x= 2x+5y
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Ответ:
Объяснение:
7x-(2y-(4y+(3y-5x)))= 7x-(2y-(4y+3y-5x)= 7x-(2y-(7y-5x))=
=7x-(2y-7y+5x)= 7x-(-5y+5x)= 7x+5y-5x= 2x+5y