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x=4*113
x=452
b)p* 15 1/3=34 1/2
p*46/3 =69/2
p=69/2 *3/46
p=207/92
c)71,2a=15
a=15:71,2
a=15*10/712
a=150/712
a≈0,211
d)a:21/2=5/6
a*2/5=5/6
a=5/6 :2/5
a=5/6 *5/2
a=25/12
a=2 1/12