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Linear Algebra
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OpenStudy (anonymous):
The sum of the digits of a two-digit number is 7. If the digits are reversed the number is increased by 27. What is the number?
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OpenStudy (anonymous):
x + y = 7 10y + x = 10x + y + 27
OpenStudy (anonymous):
This is a system of 2 equations in 2 variables and can now be solved by either substitution or elimination.
OpenStudy (anonymous):
Thank you. I just did not know how to set it up. It makes sense now.
OpenStudy (anonymous):
Your end-result number will look like "x""y". You're welcome!
OpenStudy (anonymous):
So I am getting y=5 and x=2. Therefore the numbers are 25 and 52
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OpenStudy (anonymous):
Good work! You got it right!
OpenStudy (anonymous):
Thank you!!
OpenStudy (anonymous):
You're welcome!
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