SOLUTION: could you please help me solve this problem : The length of a rectangle is 6 times longer than the width. The perimeter is 42. what is the width ? This is what I have tried: Per

Question 809625: could you please help me solve this problem : The length of a rectangle is 6 times longer than the width. The perimeter is 42. what is the width ?
This is what I have tried: Perimeter = 2l + 2w
2(6*w)+2w=42
12+2w+2w+42

Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
L for length
w for width

and directly from the description.

Substituting for L in the perimeter equation,

meaning that

Your mistake was from:

Which should have gone,

, and as shown already...
RELATED QUESTIONS
Hello, could someone please help me solve this problem. Thank you in advance.... (answered by Horlaye,Alan3354)

please help me solve this problem : the length of a rectangle is 4 ft longer than twice... (answered by stanbon)

please help me solve this problem The length of a rectangle is five times more than the... (answered by jim_thompson5910)

Please help me solve this: The length of a rectangle is 6 cm more than the width. The... (answered by Fombitz)

please help me solve this problem: the length of a rectangle is 4cm more than twice its... (answered by stanbon)

Please help me solve this word problem. Three times the width of a certain rectangle... (answered by ankor@dixie-net.com)

Could somebody please help me with this question. A rectangle has a length of 35 yards... (answered by josgarithmetic)

please help me solve this problem: the perimeter of a rectangle is forty yards. it is 1... (answered by rfer)