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Maths Puzzle
Numerical Ability
what is an arrow diagram
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A man invests part of $6,000 at 4% interest and the rest at 3% interest. His total annual income is $225. How much has he invested at each rate?
Write the sentence as an equation, using x for the unknown number. Then solve the equation.
Four times a number added to 8 times the number equals 48. Find the number.