document.write( "Question 936779: Ruby is 5 years older than Paula. She is also 7 years older than Shelly. The sum of their ages is 21. How old is each person? Justify your answer. \n" ); document.write( "

Algebra.Com's Answer #570260 by TimothyLamb(4379) $\"\"$ $\"About$

You can put this solution on YOUR website!
x = ruby age now
\n" ); document.write( "y = paula age now
\n" ); document.write( "z = shelly age now
\n" ); document.write( "---
\n" ); document.write( "x = y + 5
\n" ); document.write( "x = z + 7
\n" ); document.write( "x + y + z = 21
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "x - y = 5
\n" ); document.write( "x - z = 7
\n" ); document.write( "x + y + z = 21
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = ruby age now = 11
\n" ); document.write( "y = paula age now = 6
\n" ); document.write( "z = shelly age now = 4
\n" ); document.write( "---
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\n" ); document.write( "--- \n" ); document.write( "

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