Oblicz :
-7(a-b+4)-7-3*(2a-b) =
-(x-3y)-7+2(3x-y) =
-(4x-5y+3)-(6y-4x+5)+2(x-4) =
-3(x-2y)-4(1\2x-1\4y)+2(-1\2x-3y =
-(-5y-3x)-2(-3x+2y-7)-25 =
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1) -7a+7b-28-7-6a+3b= -13a+10b-35
2)-x+3y-7+6x-2y=5x+y-7
3) -4x+5y-3-6y+4x-5+2x-8=2x-y-16
4) -3x+6y-2x+y-x-6y=-^x+y
5) 5Y+3x+6x-4y+14-25=y+9x-11
Proszę :)