Zadanie 1 Doprowadź do najprostrzej postaci:
A) 2 (a-3b)-3(a-b)-5(4a+3b)=.....
B) 7(x+2y-3z)+4(2x-3y-5z)=.........
C)2(3a-4b+c)-5(3a+b-2c)....................
Pliz daje najwięcej punktów !!!!!!!!!!!!!!!!!!!!!
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a) 2a-6b-3a+3b-20a-15b=21a-12b
b) 7x+14y-21z+8x-12y-20z=15x+2y-41z
c) 6a-8b+2c-15a-5b+10c=9a-13b+12c
a)2a-6b-3a+3b-20a-15b=-21a+18b
b)7x+14y-21z+8x-12y-20z=15x+2y-41z
c)6a-8b+2c-15a-5b+10c=-9a+13b=12c