What is the solution of a - 3 = -7

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

This is so hard and it’s for a test

What is the solution to the equation below? 3/x-2+6=square root x-2 +8