Simplify − 4 r + s − 2 r − 3 s

Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?

If i have 20$ and i gave 5$ away how much i got

What is the equation of the line that is parallel to the line with the equation y= -3/4x +1 and passes through the point (12,-12)