book Maths Puzzle Numerical Ability

Suki has made an investment of $2500 at an annual simple interest rate of 7%. How much money does she have invested at an annual simple interest rate of 11% if the total interest e

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book Other Question
What is a good way to change

3X+15=30

into a good word problem? How do I re-write this equation using the distributive property?
6( 80 + 1). My ans. is 6 x 80 + 6 x 1