Question 1177210
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<pre>

Let x be the amount invested at 5% (in pesos)

Then the amount invested at 3% is (200000-x) pesos.


First amount creates  0.05x pesos as the annual interest;

second amount creates 0.03*(200000-x) pesos as the annual interest.


Next, you write the equation for the total interest


    0.05x + 0.03(200000-x) = 7000  pesos.


From the equation,


    x = {{{(7000-0.03*200000)/(0.05 - 0.03)}}} = 50000.


<U>ANSWER</U>.  50,000 pesos invested at 5%;  the rest,  200,000-50,000 = 150000 pesos, invested at 3%.


<U>CHECK</U>.  0.05*50000 + 0.03*150000 = 7000 pesos, the total interest.   ! Correct !
</pre>

Solved.


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It is a standard and typical problem on investments.


If you need more details,  &nbsp;or if you want to see other similar problems solved by different methods, &nbsp;look into the lesson 

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/coordinate/lessons/Using-systems-of-equations-to-solve-problems-on-investment.lesson>Using systems of equations to solve problems on investment</A>

in this site.


You will find there different approaches &nbsp;(using one equation or a system of two equations in two unknowns), &nbsp;as well as 
different methods of solution to the equations &nbsp;(Substitution, &nbsp;Elimination).


Also, &nbsp;you have this free of charge online textbook in ALGEBRA-I in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson>ALGEBRA-I - YOUR ONLINE TEXTBOOK</A>.


The referred lesson is the part of this online textbook under the topic &nbsp;"<U>Systems of two linear equations in two unknowns</U>".



Save the link to this online textbook together with its description


Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson


to your archive and use it when it is needed.