SOLUTION: If two consecutive sides of a square are represented by 4x-7 and 2x+21, find the perimeter of the square?

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Question 268035: If two consecutive sides of a square are represented by 4x-7 and 2x+21, find the perimeter of the square?





Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
the perimeter is the sum of its sides
and since the sides of a square are equal we have
p=2*(4x-7)+2*(2x+21)
4x-7=2x+21
2x=28
x=14
2x+21=21+28=49 for one side
check
4x-7=4*14-7
56-7=49
ok
4*49=196=p