Respuesta :
no you can’t add them, but you can do this: 7x+7 =0
-7 -7
7=7x
/7 /7
1=x
-7 -7
7=7x
/7 /7
1=x
No, you can’t because, to simply algebraic expressions the numbers or letters or coefficients need to be the same. 7x have a number with a letter but, the +7 only have the number. In other words, the letters and/or the exponents (in this one there’s no exponent but I’m just putting an example) need to be the same in order to combine them