Question

Solve: 2a-3=9 Solve: -3(b+2)= -9

Answer 1

2a - 3 = 9......
the first thing you would have to do is add a 3 on both sides of the equation.
2a - 3 =9        ------>    2a = 12
  +3      +3
Next, divide the 2 out from the a.
2a = 12    ---------> a = 6
/2       2/
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-3(b + 2) = -9
multiply the -3 in the parentheses

-3(b + 2) = -9 -------> -3b - 6 = -9
Add a 6 to both sides
-3b - 6 = -9 --------------> -3b = -3
     +6      +6  
Lastly divide -3 from both sides
-3b = -3  ----------------------> b = 1
/-3     /-3

Answer 2

The Solution are : a=3.
b=1.