Question

If -2x+3=7 and 3x+1=5+y, what is the value of y?

Answer 1

Answer:

y = -10

Step-by-step explanation:

To solve this, you must find the value of x first. To do this you must move the first equation so that x is by itself.

-2x + 3 = 7

Subtract 3 from both sides:

-2x = 4

Divide both sides by -2:

x = -2

Now plug in -2 for x into the second equation, like so:

3x + 1 = 5 + y

3(-2) + 1 = 5 + y

-6 + 1 = 5 + y

Add like terms:

-5 = 5 + y

Subtract 5 from both sides:

-10 = y

Answer 2

Answer:

y = - 10

Step-by-step explanation:

- 2x + 3 = 7

- 2x = 4

x = - 2

putting x = - 2 in 3x + 1 = 5 + y, we get:

3 * (- 2) + 1 = 5 + y

5 + y = - 6 + 1  

y = - 5 - 5

y = - 10

Hope this helps!