Odpowiedzi

2010-02-21T11:15:05+01:00
A
5(6-2a)+3(2-3b)-4(2a-4b)= 30-10a+6-9b-8a+16b= 36-18a+7b


b
-7(2a+3b)-9(a-2b)-3(3a+4b) =-14a-21b-9a+18b-9a-12b= -32a-15b
2010-02-21T11:15:49+01:00
A)5(6-2a)+3(2-3b)-4(2a-4b)= 30-10a+6-9b-8a+16b= 36-18a+7b
b)-7(2a+3b)-9(a-2b)-3(3a+4b)= -14a-21b-9a+18b-9a-12b= -32a-15b