SOLUTION: how do I calculate x if a rectangle has a perimeter of 66cm with a length of 10cm and a width of x-3cm laura

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Question 225942: how do I calculate x if a rectangle has a perimeter of 66cm with a length of 10cm and a width of x-3cm
laura
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
P=2L+2w
66=2(10)+2(x-3)
66=20+2x-6
52=2x
x=26
width=x-3=23cm