Question 344064
Complementary angles add up to 90
<P>
A=18+5B
A+B=90
{{{18+5B+B=90}}}
{{{18+6B=90}}}
{{{6B=72}}}
{{{B=12}}}
<P>
{{{A=18+5(12)}}}
{{{A=18+60}}}
{{{A=78}}}
<P>
Check
{{{A+B=90}}}
{{{78+12=90}}}
{{{90=90}}}
Correct