oblicz: -2x+4y-2x+y+3/5 2x+3y+x+6y+4 17a+4b+2c+3a+2b+c -21x-10y-9x-20y+3,2
oblicz:
-2x+4y-2x+y+3/5
2x+3y+x+6y+4
17a+4b+2c+3a+2b+c
-21x-10y-9x-20y+3,2
a) -2x+4y-2x+y+3/5=3/5+5y-4x b) 2x+3y+x+6x+4=9x+3y+4 c) 17a+4b+2c+3a+2b+c=20a+6b+3c d) -21x-10y-9x-20y+3,2=-30x-30y+3,2