August 2018 1 73 Report
Sprwadź, czy dane równania są równaniami tożsamościowymi.
a)2x + 3y + (x-5y) = 3x - 2y
b)12x - (2x + 1) -9(2-x) = 19x
c)3(x +21) + (2x-3) = 5x
d) 2x +3(x+2) = 6(x+1) - x

proszę o rozwiązania rozpisane :)
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