Question

An unknown number y is 15 more than an unknown number x. The number y is also x less than 8. The equations to find x and y are shown below.

y = x + 15
y = −x + 8

Which of the following statements is a correct step to find x and y?

Answer 1

y = x + 15
y = 8 - x
i think they're both right

Answer 2

Of course both equations are correct. They were given with the problem, and we're told they are the equations needed to solve the problem.

Answer 3

Multiply The Equations to eliminate y
Add The Equations To Eliminate x
Write the points where the graph of the equations intersect the x-axis

Answer 4

The second equation comes from
y is x less than 8
That is y = 8 - x which can be rewritten as y = -x + 8

Answer 5

The equations are correct. This is a given.

Answer 6

But whats The Answer?

Answer 7

The question is choosing the next step in solving this problem from a list of choices.
We can only help if we see the choices.

Answer 8

okay ill put it up

Answer 9

Ok.

Answer 10

Multiply the equations to eliminate y
Add the equations to eliminate
Write the points where the graphs of equations intersect the x-axis
write the points where the graphs of equation intersect the y - axis
@mathstudent55

Answer 11

Notice that in the first equation you have x, and in the second equation you have -x.
If you add x to -x, you get zero.
If you add the equations, x will be eliminated. Then all you have is the variable y which you can solve for.
It seems like adding the equations is a good step in solving this system of equations.

Answer 12

Okay

Answer 13

Answer is B.

Answer 14

Thank You!!

Answer 15

You're welcome.