Question

1/10(x-1)-2/15(x+1)=3/20​

Answer 1

Step-by-step explanation:

phosphoric acid is a________

Answer 2

Answer:

x = -1 x = 7/9

Step-by-step explanation:

multiplying the given eq.n by (x + 1)(x - 1) , we get...

x + 1/10 - 2(x - 1)/15 = 3(x^2 - 1)/20

3x + 3/30 - 4x - 4/30 = 3(x^2 - 1)/20

3x + 3 - 4x - 4 = 30×3(x^2 - 1)/20

-x - 1 = 9(x^2 - 1)/2

-2x - 2 = 9x^2 - 9

- 9x^2 -2x + 7 = 0

9x^2 + 2x - 7 = 0

9x^2 + 9x - 7x -7 = 0

9x(x + 1) - 7(x + 1) = 0

(x + 1)(9x - 7) = 0

x = -1 x = 7/9