dau coroana plsss repede doar a si b
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Răspuns:
a)1/2+x=8/10
Simplific prin 2
1/2+x=4/5
x=4/5-1/2
x=3/10
b)8/5+x=8/10
Simplific prin 2
8/5+x=4/5
x=4/5-8/5
x=-4/5
c) 1/2*x.=4/8
Simplific prin 4
1/2*x=1/2
x=1/2:1/2
x=1
d)x:1/2=1/3
x=2/1x1/3
x=2x1/3
x=1/6
e)x-5/6=8/9
x=8/9+5/6
Amplifica pe prima fracție cu 2,pe a doua fracție cu 3
16/18+15/18=31/18