Respuesta :
7 dollars :)
8 + 3x = 29
x = cost of burger
move the eight to the other side by subtracting it
3x = 21
divide by 3 to leave the x by itself
x = 7
8 + 3x = 29
x = cost of burger
move the eight to the other side by subtracting it
3x = 21
divide by 3 to leave the x by itself
x = 7