Find the values

Find the values
1 .   9 + - 9 = 2 .   6 × 3 + - 6 × 3 3 .   - 2 x - 3 = 7 4 .   x - 1 2 = 3 2 5 .   x - 1 2 = 3 2 6 .   3 x - 6 = 21

  • -2
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