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Cum se rezolva desfaceti parantezele si reduceti termenii ssemenea :
3×+5-(2×+7y-2)+(x-5y+3)


Răspuns :

3x+5-(2x+7y-2)+(x-5y+3)=3x+5-2x-7y+2+x-5y+3=2x+10-12y
3x+5-2x-7y+2+x-5y+3=3x-2x+x-7y-5y+5+2+3=
=2x-12y+10.