Advertisements
Advertisements
प्रश्न
If `(5x)/3 - 4 = (2x)/5`, then the numerical value of 2x – 7 is ______.
विकल्प
`19/13`
`- 13/19`
0
`13/19`
Advertisements
उत्तर
If `(5x)/3 - 4 = (2x)/5`, then the numerical value of 2x – 7 is `underlinebb(-13/19)`.
Explanation:
Given, `(5x)/3 - 4 = (2x)/5`
⇒ `(5x)/3 - (2x)/5 = 4` ...[Transposing `(2x)/5` to LHS and – 4 to RHS]
⇒ `(25x - 6x)/15 = 4` ...[Taking LCM in LHS]
⇒ 19x = 60
⇒ `(19x)/19 = 60/19` ...[Dividing both sides by 19]
⇒ `x = 60/19`
Now, `2x - 7 = 2 xx 60/19 - 7` ...[Putting the value of x]
= `(120 - 133)/19` ...[Taking LCM]
= `- 13/19`
Hence, the numerical value of 2x – 7 is `- 13/19`.
APPEARS IN
संबंधित प्रश्न
If x = 1, y = 2 and z = 5, find the value of xy + yz − zx
Write the constant term of 3x2 + 5x + 8
Write the constant term of \[4 y^2 - 5y + \frac{3}{5}\]
Identify the monomials, binomials, and trinomials in the following:
5 + 7x3y3z3
Add
2x2 − 8xy + 7y2 − 8xy2, 2xy2 + 6xy − y2 + 3x2, 4y2 − xy − x2 + xy2
How much less than x − 2y + 3z is 2x − 4y − z?
Annual salary at r rupees per month alongwith a festival bonus of Rs 2000 is ______.
Leela contributed Rs. y towards the Prime Minister’s Relief Fund. Leela is now left with Rs. (y + 10000).
Kartik is n years old. His father is 7n years old.
If 9 is the solution of variable x in the equation `(5x - 7)/2 = y`, then the value of y is 28.
