1) x+12,4=15,82 2) x-8,5=-8,5
3) 16,2+x=-7,2
4) x:4+11=10
5) x:(-10)+20=11
6) 9-3x=x+20
7) 7+(3x-8)=-8
8) 3x-(x-1)=-7
9) 5(1-x)=2(x-8)
10) 3(x+1)=-2(1-x)+6​

seems like d

step-by-step explanation:

t hope this

:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)