1 1.2 Lösning 5b

\[ \, 6\,(3 + 1 \cdot 2) - 4 \cdot 5 = 6 \cdot (3 + 1 \cdot 2) - 4 \cdot 5 = 6 \cdot (3 + 2) - 20 = \]

\[ \, = 6 \cdot 5 - 20 = 30 -20 = 10 \]