September 2018 2 15 Report

zadanie 2 strona 24 cwiczenia matematyka z plusem 2 gimnazjum

2. Sprawdż i popraw błędy.

a) 4x+y=5

3x-2y=12

y=5-4x

3x-10-8x=12

y=5-4x

x=-4,4

x=-4,4

y=22,6

b) 3x+4y=6

-x-2y=-4

3x+4y=6

x=4-2y

12-6y+4y=6

x=4-2y

-2y=18

x=4-2y

y=-9

x=22


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