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17 - q - 1 = 6
17 - 1 - 6 = q
10 = q
q = 10
17 -q -1 = 6
-q + (17 -1) = 6
-q + 16 = 6
-q = 6 - 16
-q = -10
q = -10 / -1
q = 10
kalauuu pindah ruas tanda - berubah + atau sebaliknya