38. a) The length of a rectangle is thrice its breadth. If its perimeter is 640 cm, find the
length and the breadth of the rectangle.
b) Find the value of x from the equation 2(x + 9) = 20
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Answer:
and is 20 cm
Step-by-step explanation:
2(x+9) =20
2x+18=20
then add 2x and 18
then the answer becomes
20=20
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