Allow me to demonstrate:
You have said: 2/3 (y + 57) = 178
Multiply each side by 3 : 2 (y + 57) = 534
Divide each side by 2 : y + 57 = 267
Subtract 57 from each side: y = 210
And there you see a series of steps that can be used
to solve the given equation for the value of 'y'.
There are others, but all lead to the same result.
