What is the best way to describe the solution of this system of equations?
2x - 5y = 8
5y = - 2x + 8

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: