Don't give me the answer, just explain how i can solve it, : solve: 13 - 3x = 4 (x - 2)

Acircle has a circumference of 28.36 units what is the diameter of the circle

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?