Question

Tentukan nilai x yang memenuhi persamaan berikut:
a) | 2x - 1 | = 3x
b) | x - 7 | - | 3x - 1 |

dengan caranya ya

Answer 1

Verified answer

★ Harga Mutlak ★

a) | 2x - 1 | = 3x

2x -1 = 3x
-x = 1
x = -1..... (Tidak memenuhi)

atau

2x - 1 = -3x
5x = 1
x = 1/5 ...(Memenuhi)

Hp ={1/5}



b) | x - 7 | = | 3x - 1 |
x -7 = 3x -1
-2x = 6
x = -3

atau
x - 7 = 1- 3x
4x = 8
x = 2

Hp ={-3,2}

Answer 2

A.) 2x-1 = 3x
2x-3x = 1
-x = 1
x = -1

b.) x-7-3x-1 = 0
-2x-8 = 0
-2x = 8
x = 8 : -2
x = -4

maaf kalo salah