Apple 80796

A total of 18 pear and apple trees grow in the set. Pears are 2 times less than apple trees. How many pears and apple trees are there?

Correct answer:

a =  6
b =  12

Step-by-step explanation:

a+b=18 a=b/2  a+b=18 2ab=0  Pivot:Row1Row2 2ab=0 a+b=18  Row221 Row1Row2 2ab=0 1.5b=18  b=1.518=12 a=20+b=20+12=6  a=6 b=12



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