Answer:
Step-by-step explanation:

Combine like terms. 1/4 and 7/8 are like terms and LCD of 4 and 8 is 8
9/10y and -3/5y are like terms and LCD of 10 , 5 is 10

8/3
divide both sides by 3 and you get x=8/3
Its the second one
Point slope formula is:
Y - (y1) = m ( x - (x1) )
M is the slope so -5/7
( 6 is (x1) , 2 is (y1) )
Y-2=-5/7(x-6)
As the opposite sides of rhombus are parallel. Also, the opposite sides of rhombus are equal. also it satisfies all other properties of a parallelogram.
Hence , as opposite sides of rhombus are parallel and equal also .
So
A rhombus is ALWAYS a parallelogram.