Asystem of equations is given below:

y = 3x + 4
2x + 3y = 10

which of the following steps could be used to solve by substitution?

3x+ 4= 2x+3y
2x+ 3(3x+ 4)=10
2(3x+4) + 3y =10
3(y= 3x+4)

Acollege is selling tickets for a winter fund-raiser. one day, krissa sold 14 adult tickets and 8 student tickets for a total of $376. the next day, she sold 7 adult tickets and 11 student tickets for a total of $272. krissa wanted to find the price of one adult ticket, a, and the price of one student ticket, s. she wrote and solved the following system of equations.