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Verified answer
Nilai Mutlak1.
| x + 1| + 2x = 7
| x + 1| = 7 - 2x
.
x + 1 = 7 - 2x atau -x - 1 = 7 - 2x
3x = 6 atau x = 8
x = 2 atau x = 8 (TM)
HP x = 2
2.
3|2x + 3| - 7 = - 4
3| 2x + 3| = -4 + 7
3|2x + 3| = 3
|2x + 3| = 3/3
| 2x + 3| = 1
2x + 3 = 1 atau 2x + 3 = - 1
2x = 1-3 atau 2x = -1 - 3
2x = - 2 atau 2x = -4
x = -2/2 atau x = -4/2
x = -1 atau x = -2