Respuesta :
15+x
Sum means to add "And" can also mean to add up numbers together.
Let "a number" = x
2 + x
the sum of 2 and a number: 2 + x
Sum means to add "And" can also mean to add up numbers together.
Let "a number" = x
2 + x
the sum of 2 and a number: 2 + x