Question

10. Solve the following equations.
(1) 3x - 4 = 2 x +7
(ii) 10- 11y = 15 -6y
(iii) 5x - 1/3 = 8
(iv) (12x-9) -(5x - 1) = (7x - 5)-(4x-9)​

Answer 1

Answer:

1- 3x - 2x =7+4

x= 11

2- -11y +6y = 15 - 10

= -5y =5

y= -1

3- 5x = 8+1/3

= 5x = 25/3

=> x= 25/3*5

= x = 75/3

= x = 25

Answer 2

Answer:

1)----- 3x - 4 = 2x + 7

3x - 2x = 7 + 4

x = 11 .......ANS.....

2)----- 10 - 11y = 15 - 6y

- 11y + 6y = 15 -10

-5y = 5

y = - 1.........ANS.......

3)------ 5x - 1/3 = 8

5x = 8 + 1/3

5x = 25/ 3

x = 5 /3 .........ANS.........

4) ----- (12x - 9 ) - (5x - 1 ) = ( 7x -5 ) - ( 4x - 9 )

12x - 9 - 5x + 1 = 7x - 5 - 4x + 9

12x - 5x - 9 + 1 = 7x - 4x - 5 + 9

7x - 8 = 3x + 5

7x - 3x = 5 + 8

4x = 13

x = 13/4........ANS........

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