bonjour
AE/AD = AB/AC = EB/DC
2/5 = 3 / x
x = 15 : 2 = 7.5
RB/RA = RV/RC = BV/AC
10 / ( 10 + x ) = 2/3
2 x + 20 = 30
2 x = 30 - 20
2 x = 10
x = 5
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bonjour
AE/AD = AB/AC = EB/DC
2/5 = 3 / x
x = 15 : 2 = 7.5
RB/RA = RV/RC = BV/AC
10 / ( 10 + x ) = 2/3
2 x + 20 = 30
2 x = 30 - 20
2 x = 10
x = 5