Hitunglah Nilai x Jika : 1) x + 23 = 2x - 5 2) 3x + 4x + 5x = 180

Cara Pengerjaan
1) x + 23 = 2x - 5
<=> x - 2x = -23 - 5
<=> - x = -28
<=> x = 28

2) 3x + 4x + 5x = 180
<=> 12x = 180
<=> x = 15

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1. x + 23 = 2x - 5
=> x - 2x = -5 - 23
= -x = -28
x = 28

2. 3x + 4x + 5x = 180
=> 12x = 180
x = 180/12
x = 15