Question

( 2x + 1°) + ( x - 10°) = 90° Does the equation make sense why or why not ???

Answer 1

$(2x+1)+(x-10)=90\\\\(2x+x)+(1-10)=90\\\\3x-9=90\ \ \ |+9\\\\3x=99\ \ \ |:3\\\\x=33^o$

Yes. The equation make sense. It's has the solution.

$x=33^o\\\\2x+1=2(33)+1=67^o\\\\x-10=33-10=23^o$