Solve for x and y:
We have
and
where x≠0 and y≠0
Lets simplify these equations. Assuming 1/x = p and 1/y = q, we can rewrite them,
⇒ 3p + 2q = 12 …(i)
⇒ 2p + 3q = 13 …(ii)
To solve these equations, we need to make one of the variables (in both the equations) have same coefficient.
Lets multiply eq.(i) by 2 and eq.(ii) by 3, so that variable p in both the equations have same coefficient.
Recalling equations (i) & (ii),
3p + 2q = 12 [×2
2p + 3q = 13 [×3
⇒ - 5q = - 15
⇒ q = 3
Substitute q = 3 in eq.(i)/eq.(ii), as per convenience of solving.
Thus, substituting in eq.(i), we get
3p + 2(3) = 12
⇒ 3p + 6 = 12
⇒ 3p = 12 – 6 = 6
⇒ p = 2
Thus, p = 2 and q = 3
As p = 1/x,
⇒ 2 = 1/x
⇒ x = 1/2
And q = 1/y
⇒ 3 = 1/y
⇒ y = 1/3
Hence, we have x = 1/2 and y = 1/3