Answers

2015-10-09T10:48:13+08:00
X=trees ; y=shrubs
211.25 = 5x + 15y
211.25 = 5(y+15.25) + 15y
211.25 = 5y + 76.25 +15y
211.25 = 20y + 76.25
135=20y
y=6.75
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