-2 i 3/7 + (-1 i 1/3) = to samo działanie odjąć, pomnożyć i podzielić ..
Rozwiąż równania :
a) 2x - 4 = 3x
b) 2x - 4 = 3 + 2x
c) 2x + 4 = 2 + 2(1 - x)
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a)2x-4=3x
-4=3x-2x
-4=x
b)2x-4=3+2x
2x-2x=4+3
0=7
c)2x+4=2+2(1-x)
2x+4=2+2-2x
2x-2x=2+2-4
0=0
-2 i 3/7 + (-1 i 1/3) =-2 9/21+(-1 7/21)=-3 16/21 dodawanie
-2 i 3/7 - (-1 i 1/3)=-2 9/21-(-1 7/21)=-2 9/21+1 7/21=-1 2/21 odejmowanie
-2 i 3/7 * (-1 i 1/3)=-17/7*(-4/3)=68/21=3 5/21 mnożenie
-2 i 3/7 : (-1 i 1/3)=-17/7:(-4/3)=-17/7*(-3/4)=51/28=1 23/28
a) 2x - 4 = 3x
2x-3x=4
-x=4/(-1)
x=-4
b) 2x - 4 = 3 + 2x
2x-2x=3+4
0x=7
c) 2x + 4 = 2 + 2(1 - x)
2x+4=2+2-2x
2x+2x=4-4
4x=0/4
x=0