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To jest matematyka z plusem dla 1 gimnazjum zielona strona 207 zadanie 2 podpunk A B C
A )
2/x = 3/x-1
B) 4/ x+1= 5/x
C ) 3/x = 2z-1/ 2-5x
Juz jak co to / jest kreska ułamkowa
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A )
2/x = 3/x-1 /: x(x-1)
2(x-1) = 3x
2x - 2 = 3x
2x - 3x = 2
-x = 2 / *(-1)
x = -2
B)
4/ x+1= 5/x /* x(x+1)
4x = 5(x+1)
4x = 5x + 5
4x - 5x = 5
-x = 5 /*(-1)
x = -5
C )
3/x = 2z-1/ 2-5x