August 2018 3 11 Report
Usuń nawiasy i zredukuj wyrazy podobne
a)5x+(2x-7)-9x-(-3x+8)+20-8x
b)-5x+(-2y+4x)-(7x-8y)-x+(2-6y)
c)-9z-(4-3z)-8y-(-7z+8y)+(-2y-7)
proszę pilne!!!
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