हिंदी
सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Solve: ("X" - 4)/7 = "X + 3"/7 + "X + 4"/5 - Mathematics

Advertisements
Advertisements

प्रश्न

Solve: `("x" - 4)/7 = "x + 3"/7 + "x + 4"/5`

योग

उत्तर

`("x" - 4)/7 = "x + 3"/7 + "x + 4"/5`

⇒ `("5x" - 20 = 5x + 15 + 7x + 28)/35`

⇒ 5x - 5x - 7x = 15 + 28 + 20

⇒ - 7x = 63 

⇒ x = `63/-7 = -9`

∴ x = - 9

shaalaa.com
Simple Linear Equations in One Variable
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 12: Simple Linear Equations (Including Word Problems) - Exercise 12 (C)

APPEARS IN

सेलिना Concise Mathematics [English] Class 7 ICSE
अध्याय 12 Simple Linear Equations (Including Word Problems)
Exercise 12 (C) | Q 28

संबंधित प्रश्न

Solve the following equation:

`("a" + 5)/6 - ("a" + 1)/9 = ("a" + 3)/4`


Solve the following equation:

3p = 12


Solve the following equation:

`"c" - 1/2 = 1/3`


Solve the following equation:

- 3x = 15


Solve the following equation:

2b – 14 = 8


5y + 8 = 8y – 18


Solve: 2x + 20% of x = 12.1


The difference between a number and one- fourth of itself is 24, find the number.


A man has ₹ x from which he spends ₹6. If twice of the money left with him is ₹86, find x.


Solve the following equation for the unknown: `(4x)/(27) = (8)/(9)`


Solve the following equations for the unknown: `(7)/(x - 2) - (5)/(3)` = 3, x ≠ 2


Solve the following equations: a(x - 2a) +b (x - 2b) = 4ab


Solve the following equations: 8x + a(x - b) = 10(ax - b)


For two consecutive odd natural numbers, the square of bigger number exceeds the square of smaller number by 72. Find the two numbers.


The distance between two places Bangalore and Hyderabad is 660 km. Anand starts from Bangalore with a certain uniform speed while Sonu starts from Hyderabad at the same time with a uniform speed that is 4km more than that of Anand. If they meet each other after 5 hours, find the speed of each.


The perimeter of a rectangular field is 80 m. If the breadth is increased by 2 m and the length is decreased by 2 m, the area of the field increases by 36 m2. Find the length and the breadth of the field.


The present age of a man is double the age of his son. After 8 years, the ratio of their ages will be 7:4. Find the present ages of the man and his son.


What number increased by 8% of itself gives 1620?


In a factory a worker is paid Rs 20 per hour for normal work and double the rate for overtime work. If he worked for 56 hours in a week, find the number of hours of his normal work if he receives Rs 1440 in all.


A 12 liter solution is `33(1)/(3)`% acid. How much water must be added to get the solution having 20% acid?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×