I don't really get this question but simply put, if you are in college syntax matters very much. (13-4) = 9 *(x-5) = 9x-45.. although in this case. since there isn't a bracket around 13-4. you'd multiply by the -4 first, giving you, 4x-20+30 =4x-10
Given the stated equation we know that that quadratic formula has 2 as its degree. This meats it has 2 roots. A linear equation has a degree of 1. A linear equation has 1 root. To know if they intersect, the must have one root in common. To know this, solve the two equation simultaneously. If they result to an answer then they intersect.
The missing fraction would be

since it is exactly in the halfway between
Answer:
wait writing on a piece of paper
Setting up the equation
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1)Add two x and four x together on the left side. On the right, add 10 and 7.
6x+3=17-x
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Solve:
2)Add x to both sides.
7x+3=17
3) Minus 3 from both sides
7x=15
Divide 15 by seven.
x=<span> 2.14285714286
</span>Hope this helped! Have a happy holiday!