L 5.2.3 Quiz: Two-Variable Systems: Substitution Question 7 of 10
Use the substitution method to solve the system of equations. Choose the
correct ordered pair.
y = 10x-9
y = x + 18

We get x=3 and y=21

The ordered pair will be: (3,21)

Step-by-step explanation:

We need to use the substitution method to solve the system of equations.

For substitution method we substitute the value of x or y from one equation to other.

Let:

Putting value of y from equation 2 into equation 1

So, we get value of x=3

Now, for finding value of y, We substitute the value of x

Find value of x from equation 2

Now, putting value of x in equation 1

So, we get value of y=21

So, We get x=3 and y=21

The ordered pair will be: (3,21)

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