Answer:

Step-by-step explanation:
I think what you mean is to solve the expression. Lets do it!

=> 
Therefore,
is our answer
1/3
12+3-10/15
5/15 reduce the fraction
And you get 1/3
I'm guessing the % of syrup refers to the % of sugar it has, therefore:
75% = 75 / 100 = 0.75
0.75 * x = 0.5
x = 0.5/0.75
x = 0.66
She will have 0.66 lbs of syrup
First divide both sides by 2:

Move the constant term to the right side:

Since

we want to have

Then

So in our equation, we need to add 49/16 to both sides in order to complete the square:

