Respuesta :
let man's age be x
400-3x=163
-3x=-400+163
-3x=-237
/-3
x=79
age is 79 years
400-3x=163
-3x=-400+163
-3x=-237
/-3
x=79
age is 79 years
Answer:
79 years old
Step-by-step explanation:
Let his age be x
400-3x=163
400-163=3x
237=3x
Divide both side by 3
237/3 =3x/3
79=x
The man's age (x) =79 years old