December 2018 2 7 Report
Doprowadź wyrażenia do najprostszej postaci:
a) -3(x-4y)+5(-3x+2y)+6x-y
b)10x-4(a-b)-13x+2(-3a+b)
c) -8x+3y+2(4x-2y)+6y+3x
d)11a-3(a+2b)+4(-2a-4b)+12b)
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