September 2018 2 12 Report

a) 2a+4-a+3+12a-7 =
b) 7x-4+3y+2-11x+4+10y=
c) 3x+2y+7x-3+4x+11y=
d) 2x+5-x+7=
e) 2a+4x-21a+hx-11=

Prosze o jak najszybsze rozwiazanie :] z góry dziekuje :)


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