Odpowiedzi

2010-03-10T18:27:15+01:00
A)2a+3a-2b=5a-2b
b)-4x-2x+4y+1=-6x+4y+1
c)-6x+8x-2y+x=3x-2y
d)-2x+3y+5x-5y+1=3x-2y+1
e)7a+9b-4x-5b-4=7a+4b-4x-4
f)0.5x-0.2y+x+0.7+1=1.5x-0.2y+1.7
2010-03-10T18:30:22+01:00
A) 2a+(3a-2b)=2a+3a-2b=5a-2b
b)-4x+(-2x+4y+1)=-4x-2x+4y+1=-6x+4y+1
c)-6x+(8x-2y+x)=-6x+8x-2y+x=3x-2y
d)(-2x+3y)+(5x-5y+1)=-2x+3y+5x-5y+1=3x-2y+1
e)(7a+9b)+(-4x-5b-4)=7a+9b-4x+5b+4=7a+14b-4x+4
f) (o.5x-0.2y) +(x+0.7=0,5x-0,2y+x+0,7=1,5x-02y+0,7