Respuesta :
The unknown value is 59
Substitute in 13 for x in the expression 4x+7. The new expression will look like 4(13)+7 after substituting. Next multiply 4 by 13 which will give you 52. The new expression will be 52+7, now add and you’ll have 52+7=59
Substitute in 13 for x in the expression 4x+7. The new expression will look like 4(13)+7 after substituting. Next multiply 4 by 13 which will give you 52. The new expression will be 52+7, now add and you’ll have 52+7=59