-- Subtract 9 from each side of the equation.
-- Divide each side by 4 .
-- The value of 'n' is right there, and you did it all on your own !
1 of 2 type of lettuces
1 of 4 vegetables
1 of 7 dressings
2*4*7 = 56 different salads
Y+2=(x+2) z+3=(y+3) a+4=(z+4)
