book Maths Puzzle Numerical Ability

here is my question i hav no clue about

find the expression that represents the product of 3 less than twice x and 2 more than the quantity 3 times x?

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book Other Question

*patterns and inductive Reasoning*
fine the next three terms of each sequence

1) 6,8,12,18
2)3,-4,-11,-18
3)-11,-6,-1,-4
a*b=a+2b