Given that the supplementary angle of an angle is 10° greater than three times its complement, find the measure of the angle.
已知一个角的补角比它的余角的3倍大10°，求这个角的度数．
<gadget id="calculator">10 - 180</gadget>
<output>-170</output>

<gadget id="calculator">270 + (-170)</gadget>
<output>100</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>