1. 2x + 1 = x – 92. 2x + 1 = 5x – 8

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1. 2x + 1 = x – 9

2. 2x + 1 = 5x – 8

$persamaan \\ 1).2x + 1 = x - 9 \\ 2x - x = - 9 - 1 \\ x = - 10 \\ \\ 2).2x + 1 = 5x - 8 \\ 1 + 8 = 5x - 2x \\ 9 = 3x \\ \frac{9}{3} = x \\ x = 3$

1. x = -10

2. x = 3

Penjelasan dengan langkah-persiapan:

1. 2x + 1 = x – 9

2x + 1 – 1 = x – 9 – 1

2x = x – 10

2x – x = x – 10 – x

x = -10

2. 2x + 1 = 5x – 8

2x + 1 – 1 = 5x – 8 – 1

2x = 5x – 9

2x – 5x = 5x – 9 – 5x

-3x = -9

-3x : -3 = -9 : -3

x = 3