Respuesta :
solve for b.
a=3b+9
Flip the equation.
3b+9=a
Add -9 to both sides.
3b+9+−9=a+−9
3b=a−9
Divide both sides by 3.
3b/3=a−9/3
b=1/3a−3
a=3b+9
Flip the equation.
3b+9=a
Add -9 to both sides.
3b+9+−9=a+−9
3b=a−9
Divide both sides by 3.
3b/3=a−9/3
b=1/3a−3
