Tolong di jawab ya no. 2&3.... Question from @RaraAyudhiyaAndristi

RaraAyudhiyaAndristi @RaraAyudhiyaAndristi

May 2019 2 10 Report

Tolong di jawab ya no. 2&3

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2.
$2 + \frac{11}{b} = 7 \frac{1}{2} \\ \frac{2b}{b} + \frac{11}{b} = \frac{15}{2} \\ \frac{2b + 11}{b} = \frac{15}{2} \\ 15b = 2(2b + 11) \\ 15b = 4b + 22 \\ 15b - 4b = 22 \\ 11b = 22 \\ b = 2$

3.
$3x + 12 = 6x - 18 \\ 3x - 6x = - 18 - 12 \\ - 3x = - 30 \\ x = 10 \\ \\ x - 2 \\ = 10 - 2 \\ = 8$

Maaf Kalau Salah

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Komentar Jawabannya:
2. 2+11/b=7 1/2
2b/b+11/b=15/2
15b=2(2b+11)
15b=4b+22
15b-4b= 22
11 b= 22
b= 22/11
b= 2

3. 3x+12=6x-18
3x-6x= -18-12
-3x= -30
x= -30/-3
x= 10

x-2
= 10-2 = 8

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