i need help with my math

First you cross multiply, then solve for the variable:

If given **a**/b = c/d (a is the variable in this example, which is why it is
**bold**) you would multiply a and d, and b and c so it ends up being
**a***d = b*c, then you solve for **a**. So if it were a/2 = 3/6, you would end up with:

6**a** = 6

Then you would solve for **a** by dividing both sides by the number in front of the variable (the coefficient). In this case, 6**a** divided by 6 is
**a**, and 6 divided by 6 is 1. So you would end up with **a** = 1.