Question 1107073
Assuming,
{{{A=2x}}}
{{{B=3x}}}
{{{C=4x}}}
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{{{2x+3x+4x=63}}}
{{{9x=63}}}
Solve for x, then for A, B, and C.
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*[illustration TRI.JPG].
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From the figure,
{{{x+3x+11+x=180}}}
{{{5x+11=180}}}
Solve for x.
Then from triangle CBD,
{{{x+2x+5+C=180}}}
You can substitute from above,
{{{3x+5+C=5x+11}}}
{{{C=2x+6}}}
Use the solution from x above.