Advertisements
Advertisements
प्रश्न
Solve the following equation: 7x - 2 = 4x + 7
Advertisements
उत्तर
7x - 2 = 4x + 7
⇒ 7x - 2 + 2 = 4x + 7 + 2 ..(Adding 2 to both sides)
⇒ 7x = 4x + 9
⇒ 7x - 4x = 4x + 9 - 4x ...(Substracting 4x from both sides)
⇒ 3x = 9
⇒ `"3x"/3 = 9/3` ...(Dividing by 3)
∴ x = 3
APPEARS IN
संबंधित प्रश्न
One-fourth of a number added to two- seventh of it gives 135; find the number.
A number is increased by 12 and the new number obtained is multiplied by 5. If the resulting number is 95, find the original number.
A whole number is increased by 7 and the new number so obtained is multiplied by 5; the result is 45. Find the whole number.
The sum of three consecutive numbers is 54. Taking the middle number as x, find:
(i) expression for the smallest number and the largest number.
(ii) the three numbers.
Solve the following equation: 2x + 3 = 7
Solve the following equation: 5x – 2.4 = 4.9
Solve the following equation: 48 z + 3.6 = 1.2
Solve the following equation: x - `2 1/3 = 5 1/2`
Solve the following equation: `"2z" - 2 1/2 = 3 1/3`
Solve the following equation: 2(z - 5) +3 (z + 2) - (3 - 5z) =10
