Question 1080877

Two angles are Complementary when they add up to {{{90}}} degrees (a Right Angle right angle ).

The measure of < {{{ABC=x}}}° and the measure of < {{{DBC=(3x + 10)}}}°, than the value of {{{x}}} will be:

{{{x+3x+10=90}}}

{{{4x=90-10}}}

{{{x=80/4}}}

{{{x=20}}}

so,

< {{{ABC=20}}}° 

< {{{DBC=(3*20 + 10)=70}}}°