September 2018 1 10 Report
2x + y = 4
3x (do kwadratu) = 2
x - 5 = 2x + 7
2 y = 3
y (do kwadratu) = y

Jaka liczbe nalezy podstawic w miejsce x aby otrzymac rownosc prawdziwa ?
a) x + 15 = 20
b) 12 + x = 3
c) 5x = -40
d) 9x = 6
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