Question

The perimeter of a rectangle is 86 CM. Its length is(5x-2) cm and breadth is (x+9)cm, find its length and breadth

Answer 1

Answer:

perimeter of rectangle is 2(l+b)

here l= 5x-2 and b=x+9

then given perimeter is 86cm

2(5x-2+x+9) = 86

6x+7= 43

6x= 43-7

x=36/6

x=6

now length is 5(6)-2 = 30-2 = 28 cm

breadth is 6+9= 15 cm

Answer 2

Answer:

Step-by-step explanation:

Perimeter of rectangle = 2(l+b)

= 2( 5x-2+X+9)

86 = 10x-4+2x+18

= 12x+14

86-14 = 12x

72 = 12x

X = 6

1) 5x-2 = 5×6-2= 28

2) X+9 = 6+9 = 15