Write the unknown number for n. 5.28-3.4=n

What is the solution of the systems of equations? y=2/3x+3 x=-2

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.