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x = 3-5 atau x = 5 + 3
x = -2 atau x = 8
2) 2x + 3 = 3 atau -3 -2x = 3
2x = 3-3 atau -2x = 3 + 3
2x = 0 atau -2x = 6
x = 0 atau x = - 3
3) 3x -1 = 4 atau 1 - 3x = 4
3x = 4+1 atau -3x = 4 -1
3x = 5 atau -3x = 3
x = 5/3 atau x = -1
4) 7- 5x = 1 atau 5x - 7 = 1
-5x = 1 - 7 atau 5x = 1 + 7
-5x = -6 atau 5x = 8
x = 6/5 atyau x = 8/5
5)
a) x+1 > 0 dan x - 2 > 0
x + 1 = x - 2
x-x = -2 -1 ( eror)
b) x + 1 > 0 dan x -2 < 0
x+ 1 = 2 - x
x + x = 2 -1
2x = 1
x = 1/2
c) x + 1< 0 dan x- 2 > 0
- 1 - x = x - 2
- x - x = -2 + 1
- 2x = -1
x = 1/2
d) x + 1 < 0 danx - 2 < 0
-1 - x = 2 - x
-x + x = 2 + 1 (eror)
HP x = 1/2