You can
put this solution on YOUR website!The second equation is already solved in terms of

, so you can just take the expression in

to which

is equal and substitute that expression for

in the first equation. This gives you a single equation in a single variable:
Solve

for

. Once you have determined the value for

, substitute that value into the second equation and do the arithmetic to determine the value of

.
To check your answers, substitute the values for

and

into both equations and verify that the result is a pair of true statements.