Question 1103042
1.{{{A+B+C=300000}}}
.
.
2.{{{A=B+C}}}
3.{{{B=2C}}}
Substituting from eq. 2,
{{{(B+C)+B+C=300000}}}
{{{2B+2C=300000}}}
{{{B+C=150000}}}
Substituting from eq. 3,
{{{2C+C=150000}}}
{{{3C=150000}}}
{{{C=50000}}}
Now use the equations to solve for B and A.