Q 1.) If 5 is added to three times a number, it becomes the same as 7 is subtracted from four times the same number. Find the number.
Q 2.) The age of Sohan Lai is four times that of his son Amit. If the difference of their ages is 27 years, find the age of Amit.
Q 3.) The perimeter of a rectangle is 40 m. The length of the rectangle is 4 m less than 5 times its breadth. Find the length of the rectangle.
Q 4.) A number exceeds the other number by 12. If their sum is 72, find the numbers.
Please answer
Answers
Answer:
2] 9
Step-by-step explanation:
AMIT AGE BE X
SOHAN LAL IS 4X
WE KNOW 4X-X=27
3X=27
X=27/3
X=9
Answer:
Step-by-step explanation:
1)Given situation that
3x+5=4x-7
=3x-4x=-7-5
=-x=-12
x=12.... any problem you can ask me.
2)Let x yr be the age of Amit.
Then, age of Sohan Lal = 4x yr
According to the question,
4x – x = 27
⇒ 3x = 27
⇒ x = 27/3 = 9
3)Let, the breadth be x.
⇒ length = 5x - 4
⇒ 2 ( x + 5x - 4 ) = 40
⇒ 2x + 10x - 8 = 40
⇒ 12x = 48
⇒ x = 4
So, breadth = 4m
Length = 5 x 4 -4 = 16m ( Ans )
4)Let the 1st number be x.
And the 2nd number be x + 12
According to the question
x + x + 12 = 72
⇒ 2x + 12 = 72
⇒ 2x = 72 – 12
⇒ 2x = 60
⇒ x = 30
1st Number = 30
2nd Number = 30 + 12 = 42
Hence, the numbers are 30 and 42.
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