Tentukan penyelesaian persamaan linear satu variabel berikut…

Jawaban:

a. 3x + 14 = 23

3x = 23 – 14

3x = 9

x = 9 ÷ 3

x = 3

b. 8 – 4x = 2x + 20

–4x – 2x = 20 – 8

–6x = 12

x = 12 ÷ (–6)

x = –2

c. 2(x + 3) = –4 – 3x

2x + 6 = –4 – 3x

2x + 3x = –4 – 6

5x = –10

x = –10 ÷ 5

x = –2

d. 5x – 3 ( 3- x ) = 21 + 5 ( 2x + 3 )

5x – 9 + 3x = 21 + 10x + 15

8x – 9 = 36 + 10x

8x – 10x = 36 + 9

–2x = 45

x = 45 ÷ (–2)

x = – 45/2 ( 45 per 2 )

e. 4 ( 2x + 3 ) = 3 ( x – 4 )

8x + 12 = 3x – 12

8x – 3x = – 12 – 12

5x = – 24

x = – 24 ÷ 5

x = – 24/5 ( 24 per 5 )

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