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

A. 1
B. 0
C.-10
D.10
????

O.K. Thank you do you mined telling me how you solved it?

To find the value of y, we need to solve the equations:

-2x + 3 = 7 (Equation 1)
3x + 1 = 5 + y (Equation 2)

First, we can solve Equation 1 for x. We want to isolate x, so we'll subtract 3 from both sides:

-2x + 3 - 3 = 7 - 3
-2x = 4

Next, we'll divide both sides by -2 to solve for x:

-2x / -2 = 4 / -2
x = -2

Now, we can substitute the value of x into Equation 2:

3(-2) + 1 = 5 + y
-6 + 1 = 5 + y
-5 = 5 + y

To solve for y, we'll subtract 5 from both sides:

-5 - 5 = 5 + y - 5
-10 = y

Therefore, the value of y is -10. So the correct answer is C. -10.

To find the value of y, we need to solve the given system of equations:

Equation 1: -2x + 3 = 7

Equation 2: 3x + 1 = 5 + y

Let's begin by solving Equation 1:

-2x + 3 = 7

Subtract 3 from both sides to isolate the term with x:

-2x = 7 - 3
-2x = 4

Now, divide both sides by -2 to solve for x:

x = 4 / -2
x = -2

Next, substitute the value of x into Equation 2:

3(-2) + 1 = 5 + y

Simplify the left side of the equation:

-6 + 1 = 5 + y
-5 = 5 + y

Subtract 5 from both sides to isolate the term with y:

-5 - 5 = y
-10 = y

Therefore, the value of y is -10. So, the correct answer is C. -10.