5m Zen
3x 5y 4 and
3x 5y 4 and pictures 5
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3x 5y
3x 5y 4 and
3x 5y 4 0 and
3x-5y-4u003d0 and 9xu003d2y+7 by substitution
3x 5y 4 and 2x 6y 18
3x 5y 4 and 9x 2y 7
