September 2023 1 18 Report
Diga si es verdadero o falso

a) Si 2a+b+12=2a+c+12, entonces b =c;
b) Si a+b+c+d = c+s+d+a, entonces b = s;
c) Si 1+4s+c+4t = c+1, entonces s = t;
d) Si 2x+7y = c+7y, entonces 2x = c;

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