Solve the equation 3a - 2b + 7 = 4a + 10 for a. then solve the equation for b. i need all the steps tho. does anyone know it?

First lets solve for a:

3a - 2b + 7 = 4a + 10
-3a               -3a

-2b + 7 = a + 10
      -10        -10
-2b -3  = a

Now, b:

3a - 2b + 7 = 4a + 10
-3a               -3a

-2b + 7 = a + 10
       -7        -7
-2b = a + 3
b = (a + 3)/-2

Hope this helps!