solve equation by substitution





Solve
Solve => 10 or 13 or 12 or 11..
Solve
Solve => 11 or 10 or 13 or 12..
Solve
Solve => 15 or 12 or 14 or 13..
Solve
Solve => 15 or 11 or 12 or 13..
Solve
Solve => 50 or 59 or 69 or 49..
Solve
Solve => 5 or 8 or 7 or 6..
Solve
Solve => 6 or 9 or 7 or 8..
Solve
Solve => 7 or 5 or 9 or 10..
Solve
Solve => 5 or 7 or 3 or 2..
Solve
Solve => 7 or 8 or 9 or 10..
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