Answer: Y = 1.8
Explanation:
So the parentheses that is next to the 0.18 is everything 0.18 is being multiplied by, it is the same as saying 0.18 x y and 0.18 x -1 and the same thing on the other side.
so your new equation would be
0.18y -0.18 = 0.48y - 0.72
You have a few options next, you want to get the y variable all by itself, so you should get rid of everything next to it, and you do that by doing the opposite of what it is to cross it out of one side and do it to the other side, for example
0.18y -0.18 = 0.48y -0.72
0.18y +0.18 = 0.48y -0.72 + 0.18
0.18y = 0.48y -0.54
now that you have y alone on one side, you may use the other y and subtract it from both sides.
0.18y - 0.48y = -0.54
-0.3y = -0.54
now to get y completely alone, divide it by -0.3 and -0.54
and you get the answer of Y = 1.8