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(6x - 2y) Doprowadź wyrażenia do najprostszej postaci:
5x + 7y - 2x - 9y =
(4a + 5b) + (3a - 2b) =
(6x - 2y) - (5x - 6y) =
-5(3a - 6b) =
4(3x - 5) - 3(4x + 4) =
6x - 2(4x + 2) - (-3x + 7) - 7 =
- (5x - 6y) =


Odpowiedź :

Odpowiedź:

[tex]5x+7y-2x-9y=3x-2y\\\\(4a+5b)+(3a-2b)=4a+5b+3a-2b=7a+3b\\\\(6x-2y)-(5x-6y)=6x-2y-5x+6y=x+4y\\\\-5(3a-6b)=-15a+30b\\\\4(3x-5)-3(4x+4)=12x-20-12x-12=-20-12=-32\\\\6x-2(4x+2)-(-3x+7)-7=6x-8x-4+3x-7-7=x-18\\\\-(5x-6y)=-5x+6y[/tex]