If you would like to know solve the equation 2/9 * b = 1/3 * b - 7, you can calculate this using the following steps:
2/9 * b = 1/3 * b - 7
2/9 * b - 1/3 * b = -7
2/9 * b - 3/9 * b = -7
-1/9 * b = -7
1/9 * b = 7 /*9
b = 7 * 9
b = 63
The correct result would be 63.