SOLUTION: [ If I am given equations for both the width and length of a rectangle for example the width is 3x+1 and the length is x+2 and the perimeter of the shape is given, how do I work ou

Question 817871: [ If I am given equations for both the width and length of a rectangle for example the width is 3x+1 and the length is x+2 and the perimeter of the shape is given, how do I work out what the value of x is? ]
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
w = 3x + 1
L = x + 2
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p = 2L + 2w
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p = 2(x + 2) + 2(3x + 1)
p = 2x + 4 + 6x + 2
p = 8x + 6
8x = p - 6
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Answer:
x = (p - 6)/8
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