The variable x in the expression 3+2x

Question

is replaced in succession by 1.2.3 and 4. Find the sum of the resulting numbers.

Answer 1

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when x=1 , 3+2x = 3+2(1) = 5
when x=2, 3+2x = 3+2(2) = 7
when x = 3 .....

continue