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kilo pierza=kilo zelaza
4x+6=6x+2
2x=4
x=2
b)
x-waga cegly
x=½x+1
½x=1
x=2
x - cegła
4x +6kg = 6x+2kg
4x-6x=2-6
-2x = -4/: -2
x = 2
b)
x - waga cegły
x = 1 + 1\2x
x -1/2x = 1
1/2x=1 /: 1/2
x = 2kg