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Himpunan penyelesaian 2(3x + 5) - 2(7x - 3) = x + 7 adalah ...Jwb :
2(3x + 5) - 2(7x - 3) = x + 7
6x + 10 - 14x + 6 = x + 7
-8x + 16= x + 7
-8x - x = 7 - 16
-9x = -9
x = 1