document.write( "Question 235582: Roland, Mark and Peter are 3 children in the same family. Peter is 3 times Marks age. In 2 years Peter will be twice the age Roland is at that time. Roland is 1 year older than Mark. How old are the children? \n" ); document.write( "
Algebra.Com's Answer #173535 by ankor@dixie-net.com(22740)\"\" \"About 
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Roland, Mark and Peter are 3 children in the same family.
\n" ); document.write( "Write an equation for each statement:
\n" ); document.write( ":
\n" ); document.write( " Peter is 3 times Marks age.
\n" ); document.write( "p = 3m
\n" ); document.write( ":
\n" ); document.write( " In 2 years Peter will be twice the age Roland is at that time.
\n" ); document.write( "p + 2 = 2(r+2)
\n" ); document.write( "p + 2 = 2r + 4
\n" ); document.write( "p = 2r + 4 - 2
\n" ); document.write( "p = 2r + 2
\n" ); document.write( ":
\n" ); document.write( " Roland is 1 year older than Mark.
\n" ); document.write( "r = m + 1
\n" ); document.write( ":
\n" ); document.write( " How old are the children?
\n" ); document.write( ":
\n" ); document.write( "In the second equation, replace p with 3m and r with m+1
\n" ); document.write( "p = 2r + 2
\n" ); document.write( "3m = 2(m+1) + 2
\n" ); document.write( "2m = 2m + 2 + 2
\n" ); document.write( "3m - 2m = 4
\n" ); document.write( "m = = 4 yrs is Marks age
\n" ); document.write( "then
\n" ); document.write( "r = m + 1
\n" ); document.write( "r = 4 + 1
\n" ); document.write( "r = 5 yrs is Roland's age
\n" ); document.write( ":
\n" ); document.write( "and
\n" ); document.write( "p = 3m
\n" ); document.write( "p = 3(4)
\n" ); document.write( "p = 12 yrs is Peter's age
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solution in the 2nd equation
\n" ); document.write( "12 + 2 = 2(5+2)
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