October 2018 2 39 Report

4 przykłady ze sprawdzianu do poprawienia:

a) 7x-3+4y-5-9x-6y+8

b) -(3a-5b)+[-(7a+b)-(3a-2b)]

c) 9x-4=-22

d) -4(x+5)=\frac{1}{2}(2x-7)


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