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3x - 1 = x + 3
3x - x = 3 + 1
2x = 4
x = 4 : 2
x = 2
______________
b).
2a + 3 = 3
2a = 3 - 3
2a = 0
a = 0 : 2
a = 0
3x - x = 3 + 1
2x = 4
x = 2
Himpunan penyelesaian = {2}
b. 2a + 3 = 3
2a = 3 - 3
2a = 0
a = 0 : 2
a = 0
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