2 (a - 5) - 5 = 3
Marking brainliest

9

Step-by-step explanation:

2a-10-15=3

2a=18

a=9

hope you get the explanation

a = 9

Step-by-step explanation:

2(a-5)-5=3

2a-10-5=3

2a-15=3

2a=18

a=9

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

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