PLEASE HELP!! WILL GIVE BRAINLIEST IF RIGHT what is the value of x + y for the system of equations?

y = 2/3x - 9
y= 8 - 2x

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13

probably the last option

step-by-step explanation:

48+y= ?

the y is the variable and the ? could also be a variable  

simplifying

7ln(x + 2.8) = 11.2

reorder the terms:

7ln(2.8 + x) = 11.2

(2.8 * 7ln + x * 7ln) = 11.2

(19.6ln + 7lnx) = 11.2

solving

19.6ln + 7lnx = 11.2

solving for variable 'l'.

move all terms containing l to the left, all other terms to the right.

reorder the terms:

-11.2 + 19.6ln + 7lnx = 11.2 + -11.2

combine like terms: 11.2 + -11.2 = 0.0

-11.2 + 19.6ln + 7lnx = 0.0

the solution to this equation could not be determined.

step-by-step explanation:

i searched it on google but it says that the solution to this equation could not be determined but i hope that it you a little.