Respuesta :

Answer:

f =27

Step-by-step explanation:

[tex]12 = f - 13-2[/tex]

Collect like terms and simplify

[tex]12+13+2 = f\\27 =f[/tex]

Switch sides

[tex]f = 27[/tex]

Answer:

27

Step-by-step explanation:

12=f-13-2

12=f-15

12+15=(f-15)+15

27=f-15+15

27=f

f=27