Jawab:
Penjelasan dengan langkah-langkah:
A - 7 = 6(B - 7)
A - 7 = 6B - 42
A = 6B - 42 + 7
A = 6B - 35 *
2(A + 4) = 5(B + 4) + 9
2A + 8 = 5B + 20 + 9
2A = 5B + 20 + 9 - 8
2A = 5B + 21 **
Kita masukan * ke **
2A = 5B + 21
2(6B - 35) = 5B + 21
12B - 70 = 5B + 21
12B - 5B = 21 + 70
7B = 91
B = 91/7
B = 13
Kita masukan nilai B
A - 7 = 6(13) - 42
A = 78 - 42 + 7
A = 43
Jd usia Ayah sekarang 43th
Jawaban A
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Jawab:
Penjelasan dengan langkah-langkah:
A - 7 = 6(B - 7)
A - 7 = 6B - 42
A = 6B - 42 + 7
A = 6B - 35 *
2(A + 4) = 5(B + 4) + 9
2A + 8 = 5B + 20 + 9
2A = 5B + 20 + 9 - 8
2A = 5B + 21 **
Kita masukan * ke **
2A = 5B + 21
2(6B - 35) = 5B + 21
12B - 70 = 5B + 21
12B - 5B = 21 + 70
7B = 91
B = 91/7
B = 13
Kita masukan nilai B
A - 7 = 6(B - 7)
A - 7 = 6(13) - 42
A = 78 - 42 + 7
A = 43
Jd usia Ayah sekarang 43th
Jawaban A