Question

2. 35 45 n; 10, 11, 12

Answer 1

35 = 45 - n
think of it as money
45 dollars take away how many (n) = 35 dollars
45 - n =35
or you can subtract 45 from both sides
-n = 35-45
-n = -10 
divide by -1 from both sides 
n = 10