Advertisements
Advertisements
प्रश्न
Solve: `(3"x" - 2)/7 - ("x" - 2)/4 = 2`
उत्तर
`(3"x" - 2)/7 - ("x" - 2)/4 = 2`
⇒ `(12"x" - 8 - 7"x" + 14)/28 = 2`
⇒ `(5"x" + 6)/28 = 2`
⇒ 5x + 6 = 28 × 2
⇒ 5x + 6 = 56
⇒ 5x = 56 - 6 = 50
⇒ x = `50/5 =10`
∴ x = 10
APPEARS IN
संबंधित प्रश्न
Solve the following equation:
5(8x + 3) = 9(4x + 7)
Solve the following equation:
5 – d= 12
Solve the following equation:
2x = 0
Solve the following equation:
1.3b = 39
0.4x – 1.2 = 0.3x + 0.6
6(x+4) = 36
A man has ₹ x from which he spends ₹6. If twice of the money left with him is ₹86, find x.
The length of a rectangular plot exceeds its breadth by 5 m. If the perimeter of the plot is 142 m, find the length and the breadth of the plot.
Solve the following equations for the unknown: 15y - 20 = 2y + 6
Solve the following equations for the unknown:
(3x - 1)2 + (4x + 1)2 = (5x + 1)2 + 5
Solve the following equation for the unknown: `-(3.4"m")/(2.7) = (10.2)/(9)`
Solve the following equation for the unknown: `(9y)/(4) - (5y)/(3) = (1)/(5)`
Solve the following equation for the unknown: `(2(x - 1))/(9) - (x - 1)/(2)` = 0
The sum of the squares of two consecutive odd natural numbers is 650. Find the two numbers.
In a two digit number, the ratio of the digits at the unit's place and the ten's place is 3:2. If the digits are reversed, the resulting number is 27 more than the original number. Find the two digit number.
The speed of a boat in still water is 8km/h. It takes the same time in going 20km in downstream as it takes in going 12 km upstream. Find the speed of the stream.
A tap can fill a tank in 12 hours while another tap can fill the same tank in x hours. Both the taps if opened together can fill the tank in 6 hours and 40 minutes. Find the time the second tap will take to fill the tank.
The length of a rectangle is 3 cm more than its breadth. If the perimeter of the rectangle is 18cm, find the length and breadth of the rectangle.
A 700g dry fruit pack costs Rs 72. It contains some cashew kernels and the rest as dry grapes. If cashew kernels cost Rs 96 per kg and dry grapes costs Rs 112 per kg, what were the quantities of the two dry fruits separately.
A 90 kg solution has 10% salt. How much water must be evaporated to have the solution with 20% salt?
