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a=7
b=x-3
c=x
22=7+x-3+x
22-7+3=2x
18=2x /÷2
x=9
b=x-3=9-3=6
c=9
Odp.Długość boku drugiego wynosi 6 a trzeciego wynosi 9.
bok II : x
bok III : x + 3
7 + x + x + 3 = 22
10 + 2x = 22 /-10
2x = 12 /:2
x = 6
bok II : 6 cm
bok III : 6 + 3 = 9cm
Odp: Bok drugi ma 6 cm a bok trzeci 9 cm.