document.write( "Question 1040132: please help me to solve the following problem. m
\n" ); document.write( "Brian is 4 years older than Bob while Bob is 11 years older than Mark. If their combined age is 86 years, how old is Brian? \n" ); document.write( "
Algebra.Com's Answer #654924 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
let x = Brian's age
\n" ); document.write( "let y = Bob's age
\n" ); document.write( "let z = Marks age
\n" ); document.write( ":
\n" ); document.write( "Write and equation for each phrase
\n" ); document.write( ":
\n" ); document.write( "Brian is 4 years older than Bob while
\n" ); document.write( "x = y + 4
\n" ); document.write( " Bob is 11 years older than Mark.
\n" ); document.write( "y = z + 11
\n" ); document.write( "or
\n" ); document.write( "z = y - 11
\n" ); document.write( "If their combined age is 86 years,
\n" ); document.write( "x + y + z = 86
\n" ); document.write( "Replace x and z using the above equations
\n" ); document.write( "(y+4) + y + (y-11) = 86
\n" ); document.write( "3y - 7 = 86
\n" ); document.write( "3y = 86 + 7
\n" ); document.write( "y = 93/3
\n" ); document.write( "y = 31
\n" ); document.write( ":
\n" ); document.write( " how old is Brian?
\n" ); document.write( "x = 31 + 4
\n" ); document.write( "x = 35 yrs is Brian
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "You can confirm this for yourself, find z and see if they add up to 86 \n" ); document.write( "
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