Odpowiedź:
5x-2x+7y-9y=3x-2y
(4a+3a)+(5b-2b)=7a+3b
(6x-5x)-(2y-6y)=x-4y
-5•3a-5•6b=-15a+30b
12x-5-12x+12=7
6x-8x+4+3x+7-7=-x+4
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Odpowiedź:
5x-2x+7y-9y=3x-2y
(4a+3a)+(5b-2b)=7a+3b
(6x-5x)-(2y-6y)=x-4y
-5•3a-5•6b=-15a+30b
12x-5-12x+12=7
6x-8x+4+3x+7-7=-x+4