Brianliest + 13 points : )

a shop has a special rate for changing all the tires on motorcycles or cars.
during a week where the shop changed the tires on 38 vehicles at the special
rate, 110 tires were replaced. how many motorcycles and how many cars had
all the tires replaced?

systems of equations!

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?