Question 1109910
let x be Barry's son's age
:
4x +5 = 3 * (x+5)
:
4x +5 = 3x +15
:
x = 10
:
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Barry's son's age is 10
:
check the answer
:
if Barry's son is 10 years old, then Barry is 4 * 10 = 40
: 
40 +5 = 3 * (10+5)
:
45 = 45
:
the answer checks
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