Math, asked by priyankakhalate12, 2 months ago

8. If 4X + 3Y / 4X-3Y = 43/13, then X
TY=? *
5/7
O
7/5
6/5
O
5/6
9. a3 + 10 b3/a 3-10 b3 = 205/45,
2*​

Answers

Answered by bvchratnakumari1988
5

Answer:

(ii) (4x + 3y) : (3x + 5y) = 6:7

Given, y = 10

(4x + 3 x 10) : (3x + 5 x 10) = 6 : 7

(4x + 30) : (3x + 50) = 6 : 7

7 x (4x + 30) = 6 x (3x + 50)

28x + 210 + 18x + 300

28x - 18x + 300 - 210

10x = 90

\Rightarrow x=\frac{90}{10}=9⇒x=

10

90

=9

(iii) (4x + 3y) : (3x + 5y) = 6 : 7

Given, x= 27

(4 x 27 + 3y) : (3 x 27 + 5y) = 6 : 7

(108 + 3y) : (81 + 5y) = 6 : 7

7 x (108 + 3y) = 6 x (81 + 5y)

756 + 21y = 486 + 30y

9y = 270

\Rightarrow\ y=\frac{270}{9}=30⇒ y=

9

270

=30

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