Question

A and B are together 90 years old. Five years ago A was thrice as oldas B was. Hence, the ages of A and B five years back would be (x – 5)years and (85 – x) years respectively.​

Answer 1

Step-by-step explanation:

(X-5)×(85-X)=90

X(85-X)× 5(X-5) = 90

$85x - x \times 5x - 25 = 90$

$85 - 5x { }^{2} - 25 = 90$

$85 - 5x {}^{2} = 90 + 25$

$85 - x {}^{2} = 115$

$- x {}^{2} = 115 +85$

$- x {}^{2} = 200answer$

MARK AS BRAINLIST

Answer 2

Hello Friend..!!

The answer of u r question is..!!

(X-5) (x-85) = 90

X(85-x) ×5(X-5) = 90

85X - X × 5X -25 =90

85-5x^2-25=90

$85 - {x}^{2} = 115$

$- {x}^{2} = 115 + 85$

$- {x}^{2} = 200$

Thank you..!!