Answer:
Gina's age is 18
Step-by-step explanation:
Set up an equation
Kamal = g + 17
g being Gina's age
Gina = r - 3
r being Rachelle's age
Rachelle = x
Now change every letter to x and write the equation
(x + 17) + (x - 3) + x = 77
3x + 14 = 77
- 14 - 14
3x = 63
[tex]\frac{3x}{3} = \frac{63}{3}[/tex]
[tex]x = 21[/tex]
Then plug in x for Gina's age
x - 3 = (21) - 3 = 18
