Advertisements
Advertisements
प्रश्न
If `(5x)/3 - 4 = (2x)/5`, then the numerical value of 2x – 7 is ______.
पर्याय
`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
Write the coefficient of z in −7xz
Write the coefficient of y2 in 8xy2z
Write the constant term of 3x2 + 5x + 8
Write the constant term of \[z^3 - 2 z^2 + z - \frac{8}{3}\]
Identify the monomials, binomials, and trinomials in the following:
−2xyz
Add
x3 + y3 − z3 + 3xyz, − x3 + y3 + z3 − 6xyz, x3 − y3 − z3 − 8xyz
The denominator of a fraction is 1 more than its numerator.
The number of students dropping out of school last year was m. Number of students dropping out of school this year is m – 30.
Which out of the following are expressions with numbers only?
- y + 3
- (7 × 20) − 8z
- 5 (21 − 7) + 7 × 2
- 5
- 3x
- 5 − 5n
- (7 × 20) − (5 × 10) − 45 + p
Give expression for the following case.
7 added to p
