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-\frac{3}{20}a-\frac{1}{2}b-0,75b+\frac{3}{5}b
Combineu -\frac{2}{5}a i 0,25a per obtenir -\frac{3}{20}a.
-\frac{3}{20}a-\frac{5}{4}b+\frac{3}{5}b
Combineu -\frac{1}{2}b i -0,75b per obtenir -\frac{5}{4}b.
-\frac{3}{20}a-\frac{13}{20}b
Combineu -\frac{5}{4}b i \frac{3}{5}b per obtenir -\frac{13}{20}b.
factor(-\frac{3}{20}a-\frac{1}{2}b-0,75b+\frac{3}{5}b)
Combineu -\frac{2}{5}a i 0,25a per obtenir -\frac{3}{20}a.
factor(-\frac{3}{20}a-\frac{5}{4}b+\frac{3}{5}b)
Combineu -\frac{1}{2}b i -0,75b per obtenir -\frac{5}{4}b.
factor(-\frac{3}{20}a-\frac{13}{20}b)
Combineu -\frac{5}{4}b i \frac{3}{5}b per obtenir -\frac{13}{20}b.
\frac{-3a-13b}{20}
Simplifiqueu \frac{1}{20}.