7(8a-7) = 11-4a
56a - 49 color(red)(+4a)= 11 color(red)(cancel(color(black)(-4a) +4a))
56a + 4a color(red)(cancel(color(black)(- 49) + 49))= 11 color(red)(+ 49)
(color(red)(cancel(color(black)(60)))a)/color(red)(cancel(60)) = 60/color(red)(60)
color(blue)(a = 1)