Find the value of variable x from the below diagrams.Perimeter = 36 cm

1.	Find the value of variable x from the below diagrams.Perimeter = 36 cm
Answer» Perimeter of rectangle = 36 cm 2(length + breadth) = 36 ⇒ 2(x + 4 + x) = 36 ⇒ 2(2x + 4) = 36 ⇒ \(\frac {2(2x+4)}{2} = \frac {36}{2}\)(Divide by 2 on both sides) ⇒ 2x + 4 = 18 ⇒ 2x + 4 – 4 = 18 – 4 (Subtract 4 on both sides) ⇒ 2x = 14 . = 2x/2 = 14/2 (Divide by 2 on both sides) ∴ x = 7

Answer»

Perimeter of rectangle = 36 cm 2(length + breadth) = 36

⇒ 2(x + 4 + x) = 36

⇒ 2(2x + 4) = 36

⇒ \(\frac {2(2x+4)}{2} = \frac {36}{2}\)(Divide by 2 on both sides)

⇒ 2x + 4 = 18

⇒ 2x + 4 – 4 = 18 – 4 (Subtract 4 on both sides)

⇒ 2x = 14 .

= 2x/2 = 14/2 (Divide by 2 on both sides)

∴ x = 7

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