Answer: $18
Explanation:
If weekly allowance is x
Half of it is x/2
Remaining half plus $4 is $13
x/2 + 4 = 13
Subtract by 4 both sides
x/2+4-4 = 13 - 4
x/2 = 9
Multiply both sides by 2
(x/2)*2 = 9*2
x = 18
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