Advertisements
Advertisements
Question
Set up equation and solve them to find the unknown number in the following case:
If I take three-fourths of a number and add 3 to it, I get 21.
Advertisements
Solution
Let the number be x
Three-fourth of this number = `(3x)/4`
`3/4x + 3 = 21`
`3/4x` = 18 ...(Transposing 3 to R.H.S)
Multiplying both sides by 4
`(3x xx 4)/4`
= 18 × 4
3x = 72
Dividing both sides by 3,
`(3x)/3 = 72/3`
x = 24
APPEARS IN
RELATED QUESTIONS
Laxmi’s father is 49 years old. He is 4 years older than three times Laxmi’s age. What is Laxmi’s age?
Solve the following riddle:
I am a number,
Tell my identity!
Take me seven times over
And add a fifty!
To reach a triple century
You still need forty!
In a test Abha gets twice the marks as that of Palak. Two times Abha's marks and three times Palak's marks make 280.
Marks obtained by Abha are ______.
The length of a rectangle is two times its breadth. Its perimeter is 60 cm.
- If the breadth of rectangle is x cm, the length of the rectangle is ______.
- Perimeter in terms of x is ______.
- The equation formed is ______.
- The solution of the equation is ______.
The length of a rectangle is two times its breadth. Its perimeter is 60 cm.
The solution of the equation is ______.
If 1 is subtracted from a number and the difference is multiplied by `1/2`, the result is 7.
One of the two numbers is twice the other. The sum of the numbers is 12. Find the numbers.
Thrice a number decreased by 5 exceeds twice the number by 1. Find the number.
The length of a rectangle is two times its width. The perimeter of the rectangle is 180 cm. Find the dimensions of the rectangle.
Follow the directions and correct the given incorrect equation, written in Roman numerals:
Move one matchstick to make the equation valid. Find two different solutions.
