Solve using substitution.
–9x + 6y = 18
x = 4
To solve this system of equations using substitution, we can first solve the second equation for x, and then substitute this value into the first equation.
Given: x = 4
Substituting this value into the first equation:
-9(4) + 6y = 18
Simplifying:
-36 + 6y = 18
Next, we can add 36 to both sides of the equation to isolate the variable:
6y = 54
Finally, we can divide both sides of the equation by 6 to solve for y:
y = 9
Therefore, the solution to the system of equations is x = 4 and y = 9.