5m Zen
2x 4y 7 2
2x 4y 7 2 pictures 5
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2x 4y 7 2
x 2y 7 2x 4y u003d- 2
y 2x 2 2x 4y 7
3x 4y 2 2x 7 )u003d 0
2x 4y 7 2
