SOLUTION: Ten Thousand dollars was invested in Investment A and Investemnt B for one year. Investment A earned 7% and Investment B lost 3% during the year. The total earned by Investment A a
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Question 962127: Ten Thousand dollars was invested in Investment A and Investemnt B for one year. Investment A earned 7% and Investment B lost 3% during the year. The total earned by Investment A and Investment B was $575.
How much was Invested in each of Investment A and Investment B?
Please correct my work if I did anything not correct. my answer I try are:
let x represent invest at 7%
Let y represent invest at 3%
Total amount invested is: 575
A Linear system is:
1) x + y = 10000
2) 0.07x - 0.03y = 575
solve for equation 1 for x:
x+ y= 10000
x= 10000 - y
Sub x=1000 - y in equation 2
0.07x - 0.03y = 575
0.07 (10000 - y) - 0.03y = 575
700 - 0.1y = 575
-0.1y = -125
y= 1250
Sub y = 1250 in equation 1
x+ y= 10000
x + 1250 =10000
x = 8750
