diket :
U7 = 25
U10 = 37
Dit: U20?
Jwb: S20= 20/2 (
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diket :
U7 = 25
U10 = 37
Dit: U20?
Jwb: S20= 20/2 (
= 37 -> a+9b=37 -
-3b=-12
b=4
a+6b=25
a+6(4)=25
a+24=25
a=25-24
a=1
=
=
= 10 (2+76)
= 10 (78)
= 780