Question

The two angles ${(3x+10)}^o$ and ${(2x+30)}^o$ will make a straight line then find $x$?

Answer 1

Two angles $(3x+10{)}^o$ and $(2x+30{)}^o$ make straight line

$\therefore 3x+10+2x+30={180}^o$

$\therefore 5x+40={180}^o$

$\therefore 5x=140$

$\therefore x=\frac{140}{5}={28}^o$

$x={28}^o$