Question 1092937
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G = # of grasses
W = # of weeds
T = # of trees.


W = 2G -5     <<<---===  From the condition

T = 2G + 3    <<<---===  From the condition


G +   W     +   T    = 103
G + (2G-5)  + (2G+3) = 103  ====================>


5G - 2 = 103,

5G = 103 + 2 = 105  ====>  G = {{{105/5}}} = 21.


From this point, can you complete the solution on your own ?
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