przeprowadź redukcję wyrazów podobnych
a) 4a-2b+3+3a+6b-9
b) -4a+5b-7-2a-3b+3
c) 3x+5y-4x+6y-7x-9y
d)-5x+2y-4x+5y+6x-3y
e) -2x+3y+3-2y-3x-4+y-4x+2
f) x-2y-4-2x-5+y-3+2x-6y
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a.7a+4b-6
b.-6a+2b-4
c.-8x+2y
d.-3x+4y
e.-9x+2y+1
f.x-7y-12
a)4a-2b+3+3a+6b-9=7a+4b+12
b)-4a+5b-7-2a-3b+3=-6a+2b-4
c)3x+5y-4x+5y+6x-3y=5x+7y
d)-5x+2y-4x+5y+6x-3y=-3x+4y
e)-2x+3y+3-2y-3x-4+y-4x+2=-9x+2y+1
f)x-2y-4-2x-5+y-3+2x-6y=x-7y-12