Question

The value of x in this system of equations is 1.

3x + y = 9

y = –4x + 10

Substitute the value of y in the first equation:
Combine like terms:
Apply the subtraction property of equality:
Apply the division property of equality:
3x + (–4x + 10) = 9

–x + 10 = 9

–x = –1

x = 1

What is the value of y?

y =

Answer 1

You know what x is, so plug that value into either equation and solve for y

It doesn't matter which equation you use because you'll get the same answer!

Answer 2

im not sure

Answer 3

Did you figure it out, Payton?

Answer 4

no

Answer 5

Okay let's do it, it's really easy!!

So the question solved the system of equations and got the x value
and they said x = 1

So now we find the y value by plugging in x= 1 into either equation

Answer 6

3(1) + y = 9

Or the other equation

y = -4(1) + 10

Solve for y!! You'll get the same value both times?

Why? Because that x and y value are solutions to both equations