book Maths Puzzle Numerical Ability

an initial investment is made of $2000. part at 7% and the rest at 8%. If the total yearly interest from both equals $154 how much was invested at each rate?

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book Other Question

Solve each system by the addition method.

22. x + y = 13
22x + 36y = 356


Solve each system by the addition method. Determine whether the equation are independent, de
Consecutive integers.
I need to find three consecutive integers such that the sum of their squares is 77.