Question

solve the equation
9 - 4(2 + m) = 21​

Answer 1

9 - 4(2 + m) = 21

9 - 8 + 4m = 21

1 + 4m = 21

4m = 21 - 1

4m = 20

m = 20/4

m = 5

Answer 2

Answer:

$9-4(2+m)= 21\\Or, 9-8-4m= 21\\Or, 1-4m= 21\\Or, 1- 21= 4m\\Or, -20= 4m\\Or, m= \frac{-20}{4} = -5$

Step-by-step explanation: