Question

If x - 2y = 7 and 3x - 2y = 1, what is the value of y?

Answer 1

Answer:

x= -2. putting value of x in 1 we get. -2+2y= -7. 2y= -7+2. 2y= -5. y= -5/ 2.

Step-by-step explanation:

hope it helps you

Answer 2

Answer:

Required value of y is (-5).

Step-by-step explanation:

Given,

$x - 2y = 7....(1)$ and $3x - 2y = 1.....(2)$

From equation (1),

$x - 2y = 7 \\ x = 7 + 2y....(3)$

We are putting value of x in equation (2),

$3(7 + 2y) - 2y = 1$

We are removing brackets,

$21 + 6y - 2y = 1$

We are separating variable and constant part,

$6y - 2y = 1 - 21$

We are Subtracting 2y from 6y and 21 from 1,

$4y = - 20 \\ y = \frac{ - 20}{4} \\ y = - 5$

Putting value of y in equation (3) and get,

$x = 7 + 2( - 5) \\ x = 7 - 10 \\ x = - 3$

Therefore, value of x is (-3) and value of y is (-5).

This is a problem of Algebra.

Know more about Algebra,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549

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