Question

3x-4y=1&
2x=4-3y solve by substituition method
ansX=5,Y=4​

Answer 1

Answer:

The answer u mentioned is wrong.

The correct answer is

x = 19/17 and y = 10/17

All the best

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Step-by-step explanation:

3x-4y = 1

2x = 4-3y

Suppose,

2x+3y = 4 →(1)

and 3x-4y = 1 →(2)

Taking equation (1), we have

2x+3y = 4

⇒2x = -3y+4

⇒x = (-3y+4)/2 →(3)

Putting x = (-3y+4)/2 in equation (2), we get

3x-4y =1

 3((-3y+4)/2)-4y=1

⇒ -9y + 12-8y = 2

⇒ -17y + 12 = 2

⇒ -17y = 2-12

⇒ -17y = -10

⇒ y = 10/17 →(4)

Now, Putting y= 10/ 17 in equation (3), we get

x= -3y+4

x= (-3(10/17)+4)/2

⇒x= (-30+68)/(2×17)

⇒x= 38/34

⇒x = 19/ 17

Well x = 19/17 and y = 10/17

All the best