a[ax + by = a - b] -- multiply by a b[bx - ay = a + b] -- multiply by b -------------------- adding two equations (a^2 + b^2)x = a^2 + b^2 or x = 1 now putting it in eq1 a + by = a - b or y = -1
Answer x=1 and y = -1
A test developed in 1924 by R.L. Smith & G.E. Sandland at Vickers Ltd as an alternative to the Brinell method, is used to measure what?