Answer:
Square each side
Subtract 1 from each side
Divide by 3
Explanation:
sqrt(3x+1) = 4
(sqrt(3x+1))^2 = 4^2
3x+1 = 16
3x+1-1 = 16-1
3x= 15
3x/3 = 15/3
x = 5
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