Question

If -3(y-1)=9, find the value of 1/2y

Answer 1

You need to solve for y first. So for the first step, we distribute -3 to get:
-3y+3=9. Next, we subtract 3 from the left hand side and bring it over to the right hand side: -3y+3=9
-3 -3
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-3y=6
Next, we divide both sides by -3 to get y=-2.

Now plugging back in to find (1/2)y, we get (1/2)(-2)=-1.