Answer: (6,2)
Explanation:
(7,5) (x,2) m=3 x=?
y=mx+b
y=3x+b (1)
To find the coefficient b we take the coordinate that belongs to this line (7,5): x=7 y=5
5=3(7)+b
5=21+b
5-21=21+b-21
-16=b
Thus, b=-16
Hence, y=3x-16
To find the x we take the coordinate that belongs to this line (x,2): y=2
2=3x-16
2+16=3x-16+16
18=3x
Divide both parts of the equation by 3:
6=x
Thus, x=6