Solve using substitution. y=-2 9x+6y=6 c square square

To solve the system of equations using substitution, we can follow these steps:

1. Identify the equation where a variable is already isolated. In this case, the first equation $y = -2$ has $y$ already isolated.

2. Substitute the expression for $y$ from the first equation into the second equation.

Given:
$$y = -2$$
$$9x + 6y = 6$$

Substitute $y = -2$ into the second equation:
$$9x + 6(-2) = 6$$

3. Simplify and solve for $x$:
$$9x - 12 = 6$$
$$9x = 6 + 12$$
$$9x = 18$$
$$x = \frac{18}{9}$$
$$x = 2$$

So the solution to the system of equations is:
$$x = 2$$
$$y = -2$$

The solution is $(2, -2)$.