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dit : U₁₀ ?
jwb : U₉ = a + 8b = 20
U₅ = a + 4b = 8 ₋
4b = 12
b = 12/4 = 3
substitusi b = 3 ke U₅ maka : a + 4(3) =8
a = 8 - 12
a = -4
U₁₀ = a + 9b
= -4 + 9(3)
= -4 + 27
= 23
jadi U₁₀ adalah 23
2 c
caranya tinggal masukkin angkanya ke rumus