SOLUTION: A line through the points (x,2) and (7,9) has a slope of 7/3. Find x. I think this is how to start. (7-2/7-x)=7/3 (7/7-x)=7/3 7-x-=7 -7 -7 _________ -x=0 -- --

Algebra ->  Linear-equations -> SOLUTION: A line through the points (x,2) and (7,9) has a slope of 7/3. Find x. I think this is how to start. (7-2/7-x)=7/3 (7/7-x)=7/3 7-x-=7 -7 -7 _________ -x=0 -- --       Log On


   



Question 669074: A line through the points (x,2) and (7,9) has a slope of 7/3. Find x.
I think this is how to start. (7-2/7-x)=7/3
(7/7-x)=7/3
7-x-=7
-7 -7
_________
-x=0
-- --
- 1 -1
x=o

Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
Using the slope of 7%2F3 and the (7, 9) coordinates
...
y = mx+b
...
9 = %287%2F3%297+%2B+b
b = 9 - 49%2F3
b+=+27%2F3+-+49%2F3+=+-22%2F3
...
Solve for x
2 = %287%2F3%29x+-+22%2F3
Multiply the entire equation by 3
6 = 7x - 22
...
Isolate x
7x = 6 + 22
7x = 28
Divide both sides by 7
highlight_green%28x+=+4%29
.....................
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