5m Zen
4x 5y 19 x
4x 5y 19 x pictures 5
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4x 5y
4x 5y 19 x
4x y 0 x 5y u003d- 19
4x 3y 25 x 5y 19
4x 5y 19 x 1
4x 5y 19 x 1 y
4x 5y 19 x 5y 16 elimination
4x 5y 19 x 5y 16
