I need help with my I-ready! I don't get this question.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

What are the exclude value of mn+3m