Question

(2m+5)-(4m-3) upon (3m -1)-(2m+9)= -54 upon 69. solve by cross multiplication method​

Answer 1

Answer:

1/7

Step-by-step explanation:

(2m + 5) - (4m - 3) / (3m - 1) - (2m + 9) = -54/69

= (2m + 5 - 4m + 3) / (3m - 1 - 2m - 9) = -54/69

= (-2m + 8)/ (m - 10) = -18/23

= 23(-2m + 8) = -18(m - 10)

= -46m + 184 = -18m + 180

= 4 = 28m

= 1/7 = m

Answer 2

Answer:

The value of m is -1 / 7

Step-by-step explanation:

Rules we used to solve this question :

1. When minus is multiplied with minus it is equal to plus.
2. When minus is multiplied with plus it is equal to minus.
3. When plus is multiplied with plus it is equal to plus.
4. When the term is taken from L.H.S to R.H.S or from R.H.S to L.H.S. its sign will change

{(2m + 5) - (4m - 3 )} / { ( 3m - 1 ) - (2m + 9 ) } = ( -54 /69)

{ 2m + 5 -4m + 3 } / { 3m - 1 _ 2m - 9 } = ( -54 / 69)

{ 2m - 4m + 5 + 3} / { 3m- 2m - 1 - 9 }= ( - 54 / 69)

{ - 2m +8} / { m - 10} = (- 54 /69)

By doing cross multiplication;

69 ( -2m + 8) = -54 (m - 10)

- 138 m + 552 = -54m + 540

- 138 m + 54m =540 - 552

- 84m =12

    m = 12 / -84

    m=4 /-28

     m = 1 / - 7