Both 25x and 22x + 9 have the same answers. So you set those two equal to each other.
[tex]25x = 22x + 9[/tex]
Subtract 22x from both sides.
[tex]3x = 9[/tex]
and you're left with this.
Next, divide 3 from both sides.
[tex]x = 3[/tex]
re-insert 3 into one of the equations.
[tex]25(3) = 75[/tex]
add up both angles
[tex]75 + 75 = 150[/tex]
all angles (for quadrilaterals)added up equals 360.
[tex]150 + 2x = 360[/tex]
solve for x. Subtract 150 from both sides.
[tex]2x = 210[/tex]
and divide 2 from both sides
[tex]x = 105[/tex]
AngleLMN= 105
