а:0,6 = 25:3
a*3=0,6*25
3a=15
a=15/3
a=5
2+х/5 = 2/3
(2+x)=3=5*2
6+3x=10
3x=4
x=4/3
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10a/6=25/3
30a=150
a=5
2) 2+x/5=2/3
6+3x=10
3x=4
x=4/3
а:0,6 = 25:3
a*3=0,6*25
3a=15
a=15/3
a=5
2+х/5 = 2/3
(2+x)=3=5*2
6+3x=10
3x=4
x=4/3