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1/2a=2-1 3/4
1/2a=1 4/4-1 3/4
1/2a=1/4 /*2
a=2/4
a=1/2
b)
10p-5 2/3=1 1/3
10p=1 1/3+5 2/3
10p=6 3/3
10p=7 /:10
p=7/10
c)
1/2d=2-3/4
1/2=8/4-3/4
1/2d=5/4 /*2
d=10/4
d=2 2/4
d=2 1/2
d)
2/3:b=5/6 /*b
5/6b=2/3 /*6/5
b=12/15
b=4/5