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x = total rabbits in farm y = rabbits lent to zoo 0.3 x = y - - > EQ. 1 (30% of rabbits from a farm lent to zoo) 5/6 y + 0.7 x = 228 - -> EQ. 2 (5/6 of lent rabbits were returned added to what was left of 30%) Substitute EQ1 to EQ 2 (5/6) 0.3x + 0.7 x =
