Question

HELp PLs due in like 2 hours and I have more questions do :(((((
Problem in picture

Answer 1

Donkey, shrike style

Answer 2

Option 1 , option 2 , option 4 are correct

Explanation:

`7x- 4z = (9)/(2y)\\\\\\7x = (9)/(2y)+4z\\\\\\7x = (9)/(2y)+ (4z*2y)/(1*2y)\\\\\\7x= (9)/(2y)+ (8yz)/(2y)\\\\\\7x= (9+8yz)/(2y)\\\\\\x= (9+8yz)/(14y)`

Option 1 is true

`7x - 4z= (9)/(2y)\\\\\\7x= (9)/(2y)+4z\\\\\\7x- (9)/(2y)=4z\\\\\\ (7x*2y)/(1*2y)- (9)/(2y)=4z\\\\ (14xy)/(2y)- (9)/(2y)=4z\\\\\\ (14xy-9)/(2y)=4z\\\\\\ (14xy-9)/(2y*4)=z\\\\\\z= (14xy-9)/(8y)`

Option 2 is true

`7x- 4z= (9)/(2y)\\\\\2y*(7x -4z)=9\\\\\\2y= (9)/(7x-4z)\\\\\\y= (9)/(2*(7x-4z))\\\\\\y= (9)/(14x - 8z)`

Option 4 is true