The width of door is 3 feet when the height of door is 7 feet.
Step-by-step explanation:
Let,
w represent the width of door.
Height of door = h
h = 2w+1 Eqn 1
If the door is 7 feet high, therefore;
h = 7
Putting in Eqn 1;
[tex]7=2w+1\\7-1=2w\\6=2w\\2w=6\\[/tex]
Dividing both sides by 2;
[tex]\frac{2w}{2}=\frac{6}{2}\\w=3[/tex]
Therefore,
The width of door is 3 feet when the height of door is 7 feet.
Keywords: height, division
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