Solve.
x + 3 = -12
Solve.
-x + 3 = -12
Solve.
x - 3 = 12
Solve.
-x - 3 = 12
Solve.
2x + 1 = 23
Solve.
-4x - 3 = -27
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
Solve.
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