1. The problem statement, all variables and given/known data Sure I could do this by looking at the mark scheme, but i need to know HOW and WHY, so that in the future i can do these equations by myself. Thanks :) by elimenating y, solve the simeltaneous equation 2. Relevant equations x^2 + y^2 = 10 y = 2x - 5 3. The attempt at a solution I thought i might have to make 5 the subject for the equation for this to work? Outside of this my solution was to square it but that didn't work either..