x = Nora's saved quarters we dont know full answer yet
2x + 6 = quarters Chris saved
5(x-3)= five times the difference of quarters and 3noras .
Now put equations together to solve.
2x + 6 = 5(x - 3)
Remove parentheses
2x + 6 = 5x - 15
Subtract 5x to both sides and solve x.
-3x + 6 = -15
Now subtract 6 both sides and solve
-3x = -21
x = 7 = Nora quarters
Chris original problem and substitute for x .
2x + 6 =
2 (7) + 6 =
14 + 6 = 20 quarters
So Nora has 7 quarters and Chris 20