3x + 8 = 9 + 4x :First, subtract the 8 over to the right
3x = 1 + 4x :Then, subtract the 4x over to the left
-x = 1 :Then, divide the whole equation by the -1 attached to the x
<em><u>x = -1</u></em>
SSA is not valid for congruence. SSA gives two possible triangles, one which is congruent and one which is not.
5.15 for the first hour after subtracting 12.20(7.15)