-2/3 b + 4 = 0
Add -4 to both sides to eliminate the 4 on the left:
-2/3 b + 4 - 4 = - 4
-2/3 b = -4
Multiply both sides by -3/2 to eliminate the -2/3 on the left:
-3/2 • (-2/3 b) = -3/2 • 4
b = -12/2
Simplify the solution:
b = -6
