@bcdrane42
Would it be correct to write:
3x - 9 + x + 7 = 90 because perpendicular lines meet to form right angles and right angles have a measure of 90. There's one more theorem that goes with that.
Well you have to combine the 3x-9 and x+7 = to 90
3x-9+x+7=90 combine like terms
4x=92 Divide to get x by itself
x=23 Then plug that back into x to get the two other angles.
Actually it looks like 3x-9 represents the angle between the vertical line and the 2ND LINE, not the ground. That would make what directx says correct:
3x-9+x+7=90
solving for x gives you:
23