Find all square roots of 8100?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

A.s.a.! this is a similarity in right triangles. next (solve for x)a.) 12b.) 5c.) 12.5d.) [tex] 6\sqrt{3} [/tex]

What is the value of x? enter your answer in the box.