Question 891462
1.{{{A=(1/5)T}}}
2.{{{S=(1/3)T}}}
3.{{{M=(2/7)(T-A-S)}}}
4.{{{M=18}}}
Substitute eq. 4 into eq. 3,
{{{18=(2/7)(T-T/5-T/3)}}}
{{{18=(2/7)(15/15-3/15-5/15)T}}}
{{{18=(2/7)(7/15)T}}}
{{{18=(2/15)T}}}
{{{T=(18*15)/2}}}
{{{T=135}}}