August 2018 3 13 Report
Po lewej stronie ponizszych rownosci brakuje nawiasow. Wstaw je w odpowiednich miejscach

1.
3x-2y+1-x+y = 2x-3y+1

2.

4m+2n-3+m-n+1= 5m+n-4

3.
-2t+u-w+t-1+w= -3t+u+1
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