Question 1105298
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<pre>
interest + interest       = total interest


0.045*x  + 0.065*(1200-x) = 70.60

0.045x + 0.065*1200 - 0.065x = 70.60

-0.02x = 70.60 - 0.065*1200 = -7.4  ====>  x = {{{(-7.4)/(-0.02)}}} = 370.


<U>Answer</U>.  $370 invested at 4.5%; the rest 1200-370 = 830 dollars invested at 6.5%.
</pre>

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It is very standard problem on investments.


To see other solved problems of this kind (and other approaches and other solution methods used), 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.


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 "<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.