Question 346762
Let {{{A}}} and {{{B}}} be the complementary angles.
{{{A=4x+3}}}
{{{B=2x+21}}}
By definition,
{{{A+B=90}}}
{{{4x+3+2x+21=90}}}
{{{6x+24=90}}}
Solve for {{{x}}}.
Then go back and substitute to find {{{A}}} and {{{B}}}.