Jawaban:
(90×5)+a = 85
5+1
450+a =85
6
85 × 6 = 450+ a
510 = 450+ a
A = 510 - 450
= 60
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Jawaban:
(90×5)+a = 85
5+1
450+a =85
6
85 × 6 = 450+ a
510 = 450+ a
A = 510 - 450
= 60