# The height #(h)# of a tree after #(n)# years is given by the equation #h=4n+7#. In how many years will the height be 39 feet?

##### 2 Answers

Jun 23, 2018

#### Explanation:

Set

Subtract 7 from both sides

Divide both sides by 4

But

Written as per convention

Jun 23, 2018

#### Explanation:

#"we have to solve the equation for n"#

#4n+7=39#

#"subtract 7 from both sides"#

#4n=39-7=32#

#"divide both sides by 4"#

#(cancel(4) n)/cancel(4)=32/4rArrn=8#