Question 159346
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It follows being supplementary angles:
{{{A+B=180}}}, working eqn
substitute {{{A=3x}}} and {{{B=x+8}}} to the eqn:
{{{3x+x+8=180}}}
{{{4x=180-8=172}}}
{{{cross(4)x/cross(4)=cross(172)43/cross(4)}}}
{{{x=43deg}}}
For {{{A=3*43=129degress}}}
{{{B=43+8=51degress}}}
Check, go back working eqn,
{{{129+51=180}}}
{{{180=180}}}
Thank you,
Jojo</pre>