exam Maths Puzzle Numerical Ability

twice the greater of two consecutive odd integers is 13 less than three times the lesser. find the number

define a variable
write equation
solve

can you show me how to do this problem please?

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exam Other Question

For which m is the solution of the following sistem

0 < x^2-5x+6 and mx-4 < (2xm-5(x-m))/2

is x<2?

thanks a lot!!! 2x+y=6 and 1/2x+1/4y=1 and 1/3x-1/2=3 and -2x+y=4 I am having so much problems with these kinds of problems. please help.