3/7= 0.42857143
rounded to the neared thousandth, it is 0.429
Ok so A is the same as the square root of 4b+c but all of the numbers and the answer have to be prime numbers
Solution:
1) Simplify \frac{1}{6}x to \frac{x}{6}
y=\frac{x}{6}-2
2) Add 2 to both sides
y+2=\frac{x}{6}
3) Multiply both sides by 6
(y+2)\times 6=x
4) Regroup terms
6(y+2)=x
5) Switch sides
x=6(y+2)
Done!