Question

Need help getting stuck on this problem

Answer 1

x

Explanation:

• x=5y-1--(1)

The x variable is isolated here as it's solo on left side

Solve the equations

• x+2y=13
• x=-2y+13--(2)

Equate

• 5y-1=-2y+13
• 7y=14
• y=2

x=10-1=9

Answer 2

• Variable x in first equation

Explanation:

Given system

• x = 5y - 1
• x + 2y = 13

Variables in this system are x and y.

Isolating a variable means rearranging the equation so that a variable of our interest is on its own in one side of the equal sign.

We see variable x is isolated in the first equation.

In the second equation both of the variables are on the same side so they are not isolated.