Awnser for brainliest

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.

What is the perimeter of an equilateral triangle if each side is (x+3)?