Question

ii) y-2x = 7, 4x - 2y = 5​

Answer 1

Answer:

Given equations as :

27x+ 25

y=5...(1)

4x+2y=7...(2)

From equation (1) we have value of y:

⇒7x+5y=10

⇒5y=10−7x

⇒y= 510−7x

Substitute value of y in second equation will have x value:

4x+2( 510−7x )=7

⇒20x+2(10−7x)=35

⇒20x+20−14x=35

⇒6x=15

⇒x= 25

Now replacing x value in equation 2nd will get y value 4( 25 )+2y=7

⇒20+4y=14

⇒4y=14−20

⇒4y=−6

⇒4y=−6

⇒y= 4−6y= 2−3

Now,

x−y= 25 −( 2−3 )= 25 + 23= 28=4

Step-by-step explanation:

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Answer 2

Answer:

Given equations as :

27x+ 25

y=5...(1)

4x+2y=7...(2)

From equation (1) we have value of y:

⇒7x+5y=10

⇒5y=10−7x

⇒y= 510−7x

Substitute value of y in second equation will have x value:

4x+2( 510−7x )=7

⇒20x+2(10−7x)=35

⇒20x+20−14x=35

⇒6x=15

⇒x= 25

Now replacing x value in equation 2nd will get y value 4( 25 )+2y=7

⇒20+4y=14

⇒4y=14−20

⇒4y=−6

⇒4y=−6

⇒y= 4−6y= 2−3

Now,

x−y= 25 −( 2−3 )= 25 + 23= 28=4

Step-by-step explanation:

Hope it was helpful.

❥❥Plz mark as brailiest if helpful.