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2x-1+X+2+x+2x+x-1= 7x
Drugie:
-5+7-12= 7 - 17 = - 10
6 * 3⅔= 6 * 11/3 = 66/3 = 22 ( / to kreska ułamkowa)
-17-12,5 * 2= - 17 - 25 = - 42
2x-1+X+2+x+2x+x-1=7x
2.oblicz
-5+7-12=-10
6x3⅔=6*11/3=66/3=22
-17-12,5x2=-17-25=-42