c = [( 3 + 6 + 9 + ... + 300 ) : 303 ] − 40 c = [ 3 ( 1 + 2 + 3 + ... + 100 ) : 303 ] − 40 c = [ 3 ∗ 2 ( 1 + 100 ) ∗ 100 : 303 ] − 40 c = ( 3 ∗ 101 ∗ 50 : 303 ) − 40 c = ( 303 ∗ 50 : 303 ) − 40 c = 50 − 40 c = 10 3 a − 2 b = b − 2 a + 3 c 3 a − 2 b = b − 2 a + 3 ∗ 10 3 a + 2 a = b + 2 b + 30 5 a = 3 b + 30 a = 5 3 b + 30
5 a − 3 ( b + c ) + 145 : 5 − 8 = 5 a − 3 ( b + 10 ) + 29 − 8 = 5 ∗ 5 3 b + 30 − 3 b − 30 + 21 = = 3 b + 30 − 3 b − 30 + 21 = = 30 − 30 + 21 = = 21
We calculated c from the arithmetic series, which resulted in c = 10 . We then substituted c into the equation for a and simplified the original expression step by step. The final answer is 21 .
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Nama anak yang ke-5 adalah Nina