Ronnie charge his customers a flat fee of $25 to fix computers then he charges $20 for each hour that he spent fixing the computer if Ronnie $175 off his first customers how many hours did he spend working

How do i do this? i don’t understand

Does anyone know how to do geometryme with this problem

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?