What is the solution of the following system?

3x + 3y = 10
- 9x - 9y = - 30

What is x,y in the system?

1 answer

To find the solution to the system of equations, we can use the method of elimination. Let's start by multiplying the first equation by -3 and the second equation by 1 to eliminate the x terms:

-3(3x + 3y) = -3(10)
9x + 9y = 30

1(-9x - 9y) = 1(-30)
-9x - 9y = -30

Now we can add the two equations together to eliminate the y terms:

(9x + 9y) + (-9x - 9y) = 30 + (-30)
0 = 0

We are left with 0 = 0, which means that the two equations are equivalent and describe the same line. This means that the system has infinitely many solutions. In other words, any value of x and y that satisfies one equation will also satisfy the other equation.