This is for math

Can someone explain why her answer should've been 1/2 if that's correct?

8(x-3)+7=2x(4-17)

8(x-3)+7=2x(-13)            -13, not 13

8x-24+7=-26x               -26x, not 26x

8x-17=-26x

34x=17

x=17/34=1/2               positive 1/2, not -1/2

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,