book Maths Puzzle Numerical Ability

Felipe is a teenager who is 10 years older than his sister Irene. In 6 years, Felipe will be twice as old as his sister. How old is Felipe now?

Can you please show us how to set up this equation, and the process to solve it?

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book Other Question

I am having trouble simplifying. I know it sounds silly but I have never seen this one or dont remember it. I thought that expanding the problem and elimination would be the answe Vern invested $11,000. Part was invested at 15% and part at 13%. If the total interest at the end of the year is $1,610, how much did he invest at 15%?

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