1 HARD Find the value of $$g$$ : $$1997g + 2008g + 2552g = 2013g + 3456g - 1980g$$

 2 HARD Find the value of $$y$$ given $$b = 8$$, $$e = 10$$, $$n = -17$$ and $$by + ey + ny = ben$$

 3 HARD Given $$y = 8$$, $$v = 2y + 3$$, $$e = v - 2y + 1$$, $$s = evy - ey - vy - ev$$, find the value of $$yves - sevy$$