The proof shows that opposite angles of a parallelogram are congruent. Given: ABCD is a parallelogram with diagonal AC. Prove: ∠ BAD ≅ ∠ DCB What is the missing reason In this partial proof? Question 3 options: ASA Substution Angle Angle Postulate Alternate Interior Angles are Congruent

Simplify each term.
2x/3+8+2x/3=4

Add 2x/3 and 2x/3 to get 2(2x/3).
2(2x/3)+8=4

Simplify.
4x/3+8=4

Since 8 does not contain the variable to solve for, move it to the right-hand side of the equation by subtracting 8 from both sides.
4x/3=−8+4

Add −8 and 4 to get −4.
4x/3=−4

Multiply both sides of the equation by 3.
4x=−4⋅(3)

Multiply −4 by 3 to get −12.
4x=−12

Divide each term in the equation by 4.
x=−3

x is equal to -3