Question 1055667
1.{{{M+A+B=86}}}
2.{{{B=2M}}}
3.{{{M=A-6}}}
From 3,
{{{A=M+6}}}
Substitute this and 2 into 1,
{{{M+(M+6)+2M=86}}}
{{{4M=80}}}
{{{M=20}}}
So,
{{{A=20+6=26}}}
{{{B=2(20)=40}}}