No products in the cart.

solve for x and y. 2(3x-y)=5xy …

CBSE, JEE, NEET, CUET

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

solve for x and y. 2(3x-y)=5xy 2(x+3y)=5xy
  • 1 answers

Sia ? 6 years ago

2(3x - y) = 5xy .(i)
2(x + 3y) = 5xy ..(ii)
Divide eqns. (i) and (ii) by xy,
6y2x=5  ....(iii)
and 2y+6x=5 .....(iv)
Let 1y=a and 1x=b
then equations (iii) and (iv) become
6a - 2 b = 5 ......(v)
2a -6b = 5 ...(vi)
Multiplying eqn. (v) by 3 and then adding with eqn. (vi),
18a - 6b + 2a - 6b = 15 + 5
20a = 20
 a=1
Substituting this value of a in eqn. (v),
b=12
Now 1y=a=1
or, y=1
and 1x=b=12
or, x=2
Hence, x = 2, y = 1

http://mycbseguide.com/examin8/

Related Questions

Prove that root 8 is an irration number
  • 2 answers
X-y=5
  • 1 answers
sin60° cos 30°+ cos60° sin 30°
  • 2 answers
Venu Gopal has twice
  • 0 answers
Find the nature of quadratic equation x^2 +x -5 =0
  • 0 answers
(A + B )²
  • 1 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Download myCBSEguide App