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Verified answer
U1 = a =24U4 = a+3b = 15
24 + 3b = 15
3b = 15-24
3b = -9
b = -3
JADI, b = -3. ( A)
Verified answer
U1 = 24 = aU4 = 15
a + (4 - 1)b = 15
24 + 3b = 15
3b = 15 - 24
3b = -9
b = -3 (a)