Apair of pants costs twice as much as a shirt. the total cost of 1 pair of pants and 1 shirt is $18. if s represents the cost of 1 shirt, which equation could you use to find the cost of 1 shirt?

For this case we propose a system of equations:

p: Variable representing the cost of a pair of pants

s: Variable representing the cost of a shirt

A pair of pants costs twice as much as a shirt, means:

The total cost of 1 pair of pants and 1 shirt is $ 18:

We substitute the first equation in the second:

The following equation can be used:

just needed some points but try socratic

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.