Question

3x(m-2)-2mx+9=5m+56 x=-2 m=?

Answer 1

$3x(m - 2) - 2mx + 9 = 5m + 56$

$x = - 2$

$3 \times ( - 2)(m - 2) - 2m \times ( - 2) + 9 = 5m + 56$

$- 6(m - 2) + 4m + 9 = 5m + 56$

$- 6m + 12 + 4m + 9 = 5m + 56$

$- 6m + 4m - 5m = 56 - 12 - 9$

$- 7m = 35 \: | \div ( - 7)$

$m = - 5$

Answer 2

3 × ( - 2)  ( m - 2 ) - 2 × ( - 2) m + 9 = 5 m + 56 
- 6 m + 12 + 4 m + 9 = 5 m +56 
- 2 m - 5 m = 56 - 21 
- 7 m =  35  l  : ( - 7 ) 
m =  - 5