The average yearly growth rate of the height of the tree was 2.2 feet per year during the 7 1/2 years.
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value of

Multiply 10 and 3

Now, you can solve the equation --

separate the variables aside, and the numbers aside.




Hope I helped (:
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I hope this helps you
3 (x-2)÷3 <18÷3
x-2 <6
x-2+2 <6+2
x<8