I need the resolution of these math matrices

How to determine whether two known pairs of points are on the same line.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Acampus club held a bake sale as a fund raiser, selling coffee, muffins, and bacon and eggs sandwiches. the club members charged $1 for a cup of coffee, 3$ for a muffin , and $4 for a back. and egg sandwich. they sold a total of 55 items , easing $119. of the club members sold 5 more muffins than cups of coffee, how many bacon and egg sandwiches he’s did they sell