a)7/2 - 19/6 : (- 19/9)b)- 1/7 * 1 11/24 : 3/5
a)
7/2-19/6:(-19/9)=7/2-19/6*(-9/19)=7/2+3/2=10/2=5
b)
-1/7*1 11/24:3/5=-1/7*35/24*5/3=25/72
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a)
7/2-19/6:(-19/9)=7/2-19/6*(-9/19)=7/2+3/2=10/2=5
b)
-1/7*1 11/24:3/5=-1/7*35/24*5/3=25/72