2016 question 25 t2 (a) simplify
   5(t -2)   -3(4 -2t)    a minus and minus = a plus(-  -  =   +)
= 5t -10   -12  + 6t
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(b)write down the nth term for
term 1 2 3 4 n
sequence 5 10 15 20  
multiply 5 10 15 20 5
common difference is 5                 + 5n

term 1 2 3 4 n
sequence 5 11 17 23  
multiply 6 12 18 24 6n
common difference is 6                  =6n