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tabungan anita = 35000
3 bil berurutan berarti kalo yg pertama x ; yg kedua x+1 ; yg ketiga x+2
x + (x+1) + (x+2) = 33
3x + 3 = 33
3x = 33 -3
3x = 30
x = 10
nah berarti bilangannya 10, 11, 12