# Hard SAT Math Question 15 — Video Explanation | 1600.now

Source: https://1600.now/hard/15

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15

What is the value of $63m$ if the given equation only has one solution?  
$\frac{|x+7|}{63} = m$

A

$-7$ only

B

$0$ only

C

$-7$ or $7$

D

$\frac{7}{63}$