Answer:
[tex]67\neq 0[/tex] i hope this helps! :)
Step-by-step explanation:
given 91 = -1 + 21 + 4
lets combine like terms first 91 = -1 + 25
now add one to both sides 92 = 25
subtract 25 from both sides 67 = 0
[tex]67\neq 0[/tex] there is no solution to this problem