August 2018 3 12 Report
Prosze pomóżcie mi !.!

1. 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) =

PEOSZĘ O PEŁNE ROZWIĄZANIA !!!! ; ****
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