Can someone explain how to solve this?

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

What does the sign of the slope tell you about a line?

Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x